Develop Bugs

Froyo A2SD+ SD card corruption

Tons of new ROMs coming out now based on OTA and adding A2SD+. But one big issue. Quite a number of people have reported problems with corruption of their SD cards when setting the Desire into Disk mode and connecting it to a PC. I've read it the first time here
http://forum.xda-developers.com/showpost.php?p=7463184&postcount=348
and I can confirm it is reproducible.
Regardless if connecting to Windows or Linux, the card gets corrupted. It does not matter if you properly eject the drive. The Desire will respond saying the SD card is Read Only, and the only thing that one can do is to repartition it to fix the card.
I don't know what A2SD+ application everyone uses in their ROMs but I expect it's all based on some common version like the one put in from ieftm. As this is a serious issue it would be great if all you ROM cooks could look into it and try to fix it. Alternatively it may be a good idea to produce non-deodexed versions that save a significant amount of memory when installed normally without A2SD+.
Thanks for considering

I have this problem aswell its a bit of a nightmare there are a few files on my sd card that I can't even delete using andexplorer or my pc. I think the only way would be to remove my card and format it. I have never had this problem before only when I started using the 2.2 rom.

Noticed it before, i took the SD card out and put it into a cardreader, couldnt do anything in windows, said it was read only. Access via USB cable worked though.
Not that much of a issue for me, I mainly transfer files via Wi-Fi anyway, but I guess thats the explanation for the read-only behaviour.

Happened to me today, however I restarted the phone and everything seems okay now... :/
edit: nope, connected the phone again, chose "charge only" and then disconnected. The notification about my card being corrupted occured again, tapped on it and it went away... Dont know what to think..

I have the same problem .. And now it seems like the SD card is totally corrupted. Its not even possible to do a format

Okay thats it... Doing the titanium backup, nand backup and flashing some rom w/o A2SD+... :/

Out of curiosity guys, did the corruption of the SD card occur to the stock SD card that came with the Desire? I had the same problem with the stock card..
It seemed to unmount 3 or 3 times over a week and the next thing I knew it totally died and could not even be reformatted.. Happened on stock 2.1 that came with my Desire.. after I swapped to me own class 6 8gb Transcend I never had the proble again.. Just gonna upgrade to 2.2 now.. *fingers crossed*
Oh and yes.. I use A2SD+ on Modaco's 3.1. But that was after that card got corrupted..

I'm using card that came with the phone.
I'm going to try another Froyo Rom, just OTA rom rooted and we'll see.
Edit: I made my ext3 partition with ROM manager, if it makes any difference...

God dammit!
http://forum.xda-developers.com/showthread.php?t=747480

Yes its the card that came with the phone .. but it happen after i created the 512MB EXT3 Partition ... and I'm running this ROM : http://ip208-100-42-21.static.xda-developers.com/showthread.php?t=741775&highlight=official it doesnt even use A2SD+

I dual boot my pc with windows 7 & ubuntu.... windows 7 scan and fix has repaired mine numerous times

I have class6 A-DATA 8GB and no problem. But with my last G1 i haved same card and with swapping goes to hell... I now correctly unmounting and disconnecting mobile from PC, after i save from PC to card. Flash have problems with writing.

This looks like a serious problem - it happened to me twice already. Devs, please have a look at this!

I have also had similar experience, SD card corrupt, yes it was the original card that came with the phone, EXT2 partitioned and using APSD+
Now why this happend is a mystery, but something I noticed when I tried the SD card in the PC - it was recognized, but said it must be formated, so I tried but it only saw it as a 32mb capacity!!! (it still would not format though - failed format..and since is no longer reconized at all..)
But, this made me think it "MAY" be something to do with the fact that when I did the Ext2 partition I seem to remember it also created a 32mb swap partition, or using Ext2 instead of Ext3. I have since learnt that it is advisable NOT to created a swap partition, so with my new SD card, after more reading about Ext partitions etc, I have only created only the Ext3 partion as I understand this is better than Ext2 and is less prone to corruption, and no swap partition and have had no problem since!
See this excellent post :- http://forum.xda-developers.com/showpost.php?p=7458565&postcount=8
It would be interesting to have some input from one or two of the developers with knowledge in this field to get an idea why this happens, and how it can be prevented.
It is also possible the the SD card was going to become corrupt anyway... with or without the help of Ext? / APSD+ - it does happen!

delta-101 said:
I have since learnt that it is advisable NOT to created a swap partition, so with my new SD card, after more reading about Ext partitions etc, I have only created only the Ext3 partion as I understand this is better than Ext2 and is less prone to corruption, and no swap partition and have had no problem since!
Click to expand...
Click to collapse
my sd was corrupt using a 512MB ext3 partition without swap partition in SD card :/

Try in windows: start > run > chkdsk x: /f
where x = desire drive letter.
I believe i did this in recovery mode > mount usb.

That's what happens when you don't want to use Froyos own A2SD implementetion because "widgetz doesnt workzz on dat."
Apps are not meant to be on an external EXT partition.
Wait until ROMs like CM have built in A2SD+, these hacky shell scripts can cause serious problems for the SD card.

LeeDroid said:
I dual boot my pc with windows 7 & ubuntu.... windows 7 scan and fix has repaired mine numerous times
Click to expand...
Click to collapse
Windows can not access EXTx partitions. As such is unfortunately not possible that it could possibly repair a broken SD-ext partition A2SD+ uses.

delta-101 said:
I have also had similar experience, SD card corrupt, yes it was the original card that came with the phone, EXT2 partitioned and using APSD+
Now why this happend is a mystery, but something I noticed when I tried the SD card in the PC - it was recognized, but said it must be formated, so I tried but it only saw it as a 32mb capacity!!! (it still would not format though - failed format..and since is no longer reconized at all..)
[...]
It is also possible the the SD card was going to become corrupt anyway... with or without the help of Ext? / APSD+ - it does happen!
Click to expand...
Click to collapse
I can confirm the corruption without any APSD+ ROM
I had a Stock Orange FR 2.1 ROM, and the 4Gb card that came with the phone get corrupted definitively (recognized as a 32mb capacity too, it has something to do with the Cylinder-head-sector combination).
Anyway, I'm going to try APSD+ with a class 2 PNY 16Gb, and tell you then if I get a corrupted card.
FYI, the Sandisk warranty is applicable for the original card: replaced in 5 days

I got some problems too with corruped files on my SDcard and had to format it. I'm thinking that from now i'll only mount my card to pc in recoverymode... maybe that is safe to do?

[Q] USB Data transfer rate is too slow in my desire...help plz..!!

After rooting,, my Desire's usb data transfer rate has drastically reduced...
currently i'm running Open Desire 4.0 froyo rom,
i have tried many ROMs but the data transfer dint improve ,
i'm getting 1.5 to 2Mbps depending on the Size of the file,
i'm using class2 Transcend 8gb sd card....
so can somebody tell whats wrong with my cellphone..???

harish.awe said:
After rooting,, my Desire's usb data transfer rate has drastically reduced...
currently i'm running Open Desire 4.0 froyo rom,
i have tried many ROMs but the data transfer dint improve ,
i'm getting 1.5 to 2Mbps depending on the Size of the file,
i'm using class2 Transcend 8gb sd card....
so can somebody tell whats wrong with my cellphone..???
Click to expand...
Click to collapse
because have you ROOT

Class 2 microsd write speed is 2mbps. Seems your transfer rates are fine. Try a class 4 or 6 card and see what you get.

killawatts said:
Class 2 microsd write speed is 2mbps. Seems your transfer rates are fine. Try a class 4 or 6 card and see what you get.
Click to expand...
Click to collapse
No, if you have rooted phone, after root slow usb
I have Class 10 and slow. Before root OK, after slow.
Indepedence sdcard, fat32 or fat+ext ... slow

Absolutely,, before rooting i was gtting 5mbps transfer rate with the same sd card.....
But i dont understand what does rooting to do with data transfer rate,,,,???

harish.awe said:
Absolutely,, before rooting i was gtting 5mbps transfer rate with the same sd card.....
But i dont understand what does rooting to do with data transfer rate,,,,???
Click to expand...
Click to collapse
It's probably the EXT partition...
I have the same problem.

I dont have a SD EXT partition and its really SLOW! 500KB/S! Please helpp! Got alot of stuff copying back to sdcard

Can be a kernel problem as well. Try to search on the forum, I recall a thread where was a solution to this.

Transcend class 2 surely goes over 2 MB/s writing speed, i would also say it's something that has to do with the microSD partitions,maybe formatting and repartitioning would help

AlSopranos said:
I dont have a SD EXT partition and its really SLOW! 500KB/S! Please helpp! Got alot of stuff copying back to sdcard
Click to expand...
Click to collapse
are you confusing the write speed and the read speed?? when you copy something from your sd card to somewhere else. that is the read speed! you will get about 5mb/s on any class of sd card... when you copy somthing to a sd card, thats the write speed, and there is no way you will ever get more than 2mb/s with a class 2 card, end off! full stop

Pretty sure class determines the minimum, not the maximum, write speed.

I'm also quite pi**ed off with the copy speed.
On stock rom it was definetely fast and now absolutely slow.
Are you serious it is because of root?
Well, i prefer root more than faster writing speed - but i would really love to know the reason for!

What ROM do you have now? Flash a kernel with the SD fix, and you'll get back some speed, but not the maximum (if your card is partitioned).

I'm using Amethyst RC 7 (2.3.2), using A2SD+.
i think for GB is no kernel fix available? But to be serious, i've never thought about another kernel as the one which is included in the rom.
Any help is appreciated

so, i got the hint to use multi-móunt sd card which works really fine. I get again about 2mb/sec which is absolutely ok..

Actually, yes this is Kernel related.
Sadly the latest Kernel .37 is affected.
But Luckily there is a fix.
Look here
http://forum.xda-developers.com/showpost.php?p=11187612&postcount=808

lol strange but i was getting around 1-1.3mb on my class-2 8GB card,now after rooting,i am getting 3-4mbps.
also on other card which was 2gb(donno about its class)i used to get 3-4mbps write speed & now after rooting i get 10mbps.
P.S. i have custom rom installed

I had the same prob...
Solved it by ,completely formating my SDCard (dont forget to mount the partitions in Recovery) and after flashing a new rom,i flashed Cutts kernel and all works fine now again

I used to have approximately 5.0MB/s writing speed before rooting my HTC Desire. Since then, the speed dropped to 150~500KB/s. I tested with OpenDesire, PAYS-MIUI, MIUI, CM6/7 and they all give me the same slow speed. I read in one of the forum that Kernel 2.6.35.x solves the speed problem but I have not tried it. Anyway, a satisfactory work around for me is to use FTP file transfer from File Expert. The downside is, you'll need a stable WIFI connection to transfer large files.
Cheers

[HOWTO] Link2SD a SanDisk 64GB microSDXC on a T989

work in progress...
Prerequisite:
- Get a SanDisk 64GB microSDXC details here http://forum.xda-developers.com/showthread.php?t=1343164
- Root your phone
- Install Link2SD
you can get Link2SD from our in house local developer http://forum.xda-developers.com/showthread.php?t=919326
all Link2SD related bugs or problems should be reported there
you can also get Link2SD directly from the Android Market
Link2SD
Bulent Akpinar
https://market.android.com/details?id=com.buak.Link2SD&hl=en
step 1:
prepare your spanking brand new SanDisk 64GB microSDXC,
you can partition it any way you want, i choose to go 50%&50% as i know i'm will be installing a lot of Apps/Games and i know i've maxed out 16GB easily everytime, that's why i'll need at least 32GB to be comfortable (later on you'll know why) in the new sd card
the best tool to partition your new 64GB SD is Gparted (yes Linux), you can get Gparted in a lot of ways, most times included in any Desktop Linux installation, or you can get the Gparted LiveCD from http://gparted.sourceforge.net/livecd.php
you'll need to create 2x primary partitions, the first partition must be FAT32 (is not really a must, but you'll need that if you want to be able to see your SD card space when mounted as USB storage), the second partition it's highly recommended to use ext4, as Gparted seems to have problem trying to format ext3 on the SanDisk 64GB microSDXC, older phones can use ext2 if the phones are missing the support for ext4 (example Milestone XT720)
if you are not comfortable with Linux, you can easily create 2x FAT32 partitions in your SD card using Disk Management in windows, just make sure both partitions are Primary partitions.
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step 2:
once you're done with the disk partitioning and formatting of your brand new SanDisk 64GB microSDXC; it's time to finally launch Link2SD to do its magic
as soon as you run Link2SD you'll be greeted with this screen asking you to choose the disk format of your SD card 2nd partition, which is what we did on step 1
if you formatted your 2nd partition as ext4 then you must choose ext4
if you formatted your 2nd partition as FAT32 then you choose FAT32
step 3:
reboot your phone, when Link2SD prompts you to do so,
you must reboot for the changes to take effect
step 4:
when the phone is back from reboot (should not take more than 30 sec)
run Link2SD again, hit the Menu capacitive button, and select Storage Info then you should see this screen confirming everything was a success!
step 5:
now you can start moving apps 2 sd, which in Link2SD term is known as "Create Link" (it actually does way more than just create links)
this is what you'll see...
anything that says on SD Card are created by the build in AOS App2SD "Move to SD card" feature that was available since Froyo 2.2
anything that says Linked -> SD Card are created by Link2SD after you hit the "Create Link" option button
... an unrelated screen-shoot of the phone memory performance

Benefits:
- Apps on SD remains accessible even when the SD is mounted as USB flash drive
- Apps moved to SD will act & behave as if they were installed in the internal memory
- Apps that are not natively Apps2SD compatible can still be moved to SD without breaking it
- Apps compatible
- Games compatible
- Widgets compatible
- you can now go beyond the 1GB~2GB limit of the reserved internal memory space
- you can better and easily manage apps to go between internal, external (/sdcard/external_sd/), SD (/sdcard/), and Link2SD (hidden ext4)
- if you are familiar with CM7, with Link2SD you can also set the default install path to be internal, external or auto
- you can easily keep separate SD cards with different apps / games, specially those you want to Hide from public (family) & friends access
Cons:
- none?
- if you take out the SD card, any Apps & Widget that ran directly from the SD card will be temporally unavailable until you put the SD card back in

Tips & Tricks
Gameloft games
There are 3 types of GL games:
- Older GL games will install all into the internal memory, those are easy to deal with with Link2SD
- Recent GL games that are Froyo App2SD aware, will install a small portion in either internal or to SD, but all the extra "DATA" contents usually in the size of 600+ MB are left on SD card (these are not handled by Link2SD), the work around is simple use a Mount script and forward all the
/sdcard/gameloft/ to /sdcard/external_sd/gameloft/
- The a few more recent kind of GL games will let you select where to store the "DATA" chunk to either internal or external sd, for these types you'll choose internal, then Link2SD will do the rest
Some of you have requested this script i'm using
Code:
mount -o -bind /sdcard/external_sd/gameloft/ /sdcard/gameloft/
mount -o -bind /sdcard/external_sd/ea/ /sdcard/ea/
mount -o -bind /sdcard/external_sd/glu/ /sdcard/glu/
mount -o -bind /sdcard/external_sd/download/ /sdcard/download/
mount -o -bind /sdcard/external_sd/DCIM/ /sdcard/DCIM/
you can even include more stuff there, just be careful with what you add, to not break your OS
for example you can technically also throw in /sdcard/Android/data/ ... but some apps are required during boot, and it might not work if you have it on the /external_SD so the safe way would be to only add the specific apps you know are not required during boot time, like all the games and stuff like that.

thanks for your efforts.
i have some questions:
have you felt any lag between having all apps stored on internal storage, and apps stored on sd ext?
do you feel a difference in preformance based on how many applications have downloaded?
i ask because i used to do this for my g1 back in the days, and the phone was just so slow twards the end of it's life, that i would feel a lag when using apps 2 SD, or maybe it was a placebo, or maybe the phone was just incompetent, does it matter with this much power in our hands?
also while we're on the subject of memory, has any one ever elaborated on the process by which apps are killed to free up ram in the phone, i'm not an expert so i wouldn't know what it's called, but i heard that our ram is so high, and the memory killer kills the apps way too early, causing unnecessary apps to be killed when we could have them just chilling in the ram waiting to be re-opened.

I know exactly what you mean, and I'm happy to report there's no lag whatsoever with this phone.
I have done it before on my older phones and yes indeed there's that 1 or 2 sec loading lag, but none at all in the T989, I'll attribute that to either the Dual Core CPU or the super fast SD card reader, or perhaps a combination of both.
back then on my other phones using a class 6 as well it was still not fast enough, a class 4 was obviously even longer at loading, and a class 2 was pretty much pointless to do APPS2SD
But in this phone even a class 4 is not bad, barely noticeable
so definitely get a class 6 or class 10 SD card for this sort of operations
Sent from my SGH-T989 using xda premium

@allgamer
Why do you need to create two partitions for this?

jeffpzy said:
@allgamer
Why do you need to create two partitions for this?
Click to expand...
Click to collapse
it's a requirement for the Link2SD App

post #3 updated http://forum.xda-developers.com/showpost.php?p=19779495&postcount=3

Ooo I want one!!!!!!!!
Current-*Samsung Galaxy S2 (Gingersnap v1.1)*|*Htc Sensation (rooted w/ XE Dr. Dre Beats Technology)*|*Samsung Galaxy S Vibrant (rooted w/ cm7)*|*Mytouch 4g (stock)*|*Mytouch Slide (stock)*|*Htc G1 (stock)

"you can easily create 2x FAT32 partitions in your SD card using Disk Management in windows, just make sure both partitions are Primary partitions"
Is there a tutorial for this. Thanks

Windows Easy button
dddsj said:
Is there a tutorial for this. Thanks
Click to expand...
Click to collapse
Try this tool. It's super quick and easy, and if you're stuck using Windows then it's about as good as it'll get for ya. Super easy and straight-forward, but in case you're worried (whatever you do don't format the one that is called "C:", lol ) the site has tons of info on how to use it and whatnot. I've been in IT for some time now and whenever someone asks me about partitioning in Windows, this is always where I send 'em for the "do it yourself" easy button.
Here's the program I'm talking about:
http://www.partitionwizard.com
Hope this helps, and good luck!

problems installing/moving apps to sd
Hey guys i have been unable to move/install apps to my sd card ever since changing to MIUI I'm not sure whether this is a problem with the ROM or not (i think i may have insalled applications to SD on a previous GB version of MIUI)
I am using a rooted Samsung Galaxy S2 I9100 with the latest MIUI based on 4.0.4. before MIUI i was on CM7 stable and i remember messing around with some settings there to try and get my phone to read music off the sd card as well as internal memory-(where all my downloaded music was going). I also may have done a dodgy partition on my old 32gb micro sd or some how partitioned my internal storage of my phone...
I have recently partitioned my 64gb micro sdXC to this tutorial successfully...
http://forum.xda-developers.com/showthread.php?t=1343187
when i go to move a 'moveable' app eg. Paypal through 'Link2Sd' it comes up with an error saying "pkg:/data/app/com.paypal.android.p2pmobile-1.apk Failure [INSTALL_FAILED_CONTAINER_ERROR]
when i go to move a 'moveable' app through 'App 2 SD Pro' it says 'couldn't move app'
the following are my phones storage details...please point out if you think there is anything strange about them
this last picture was taken before i partitioned my SD
if you guys have an suggestions please let me know

Good info
TylerMF said:
Try this tool. It's super quick and easy, and if you're stuck using Windows then it's about as good as it'll get for ya. Super easy and straight-forward, but in case you're worried (whatever you do don't format the one that is called "C:", lol ) the site has tons of info on how to use it and whatnot. I've been in IT for some time now and whenever someone asks me about partitioning in Windows, this is always where I send 'em for the "do it yourself" easy button.
Here's the program I'm talking about:
http://www.partitionwizard.com
Hope this helps, and good luck!
Click to expand...
Click to collapse
Good info but as you know nobody is stuck on windows... Linux is free software and its a good practice to partition your Pc and install Linux next to windows, dual boot...

Whatever I try, may phone always says the SD card is damaged.
I exactly followed the steps of this how to, only possible explanation for me is that its not working to use the phone itsself as the cardreader for the partition process.
*edit*
After getting an external SD Card reader it worked like a charm.
So I can just recommend what most people recommend: do not use your phone as SDcard reader for partitioning.

As you mention that partition can be as I like. you choose 50/50 which less then 32G which supported for FAT partition.. Can it work if I want 80/20. Example, having 50G with FAT and another 14 as EXT. because the FAT only support up to 32G. I don't have the card now. Just want to confirm before buying it. Thanks.

This is very helpful! A recent purchaser of the 64 gb class 10. :laugh:

How To ?
AllGamer said:
Gameloft games
There are 3 types of GL games:
- Older GL games will install all into the internal memory, those are easy to deal with with Link2SD
- Recent GL games that are Froyo App2SD aware, will install a small portion in either internal or to SD, but all the extra "DATA" contents usually in the size of 600+ MB are left on SD card (these are not handled by Link2SD), the work around is simple use a Mount script and forward all the
/sdcard/gameloft/ to /sdcard/external_sd/gameloft/
- The a few more recent kind of GL games will let you select where to store the "DATA" chunk to either internal or external sd, for these types you'll choose internal, then Link2SD will do the rest
Some of you have requested this script i'm using
Code:
mount -o -bind /sdcard/external_sd/gameloft/ /sdcard/gameloft/
mount -o -bind /sdcard/external_sd/ea/ /sdcard/ea/
mount -o -bind /sdcard/external_sd/glu/ /sdcard/glu/
mount -o -bind /sdcard/external_sd/download/ /sdcard/download/
mount -o -bind /sdcard/external_sd/DCIM/ /sdcard/DCIM/
you can even include more stuff there, just be careful with what you add, to not break your OS
for example you can technically also throw in /sdcard/Android/data/ ... but some apps are required during boot, and it might not work if you have it on the /external_SD so the safe way would be to only add the specific apps you know are not required during boot time, like all the games and stuff like that.
Click to expand...
Click to collapse
Sorry for taking so long to reply, but I'm intrigued how this method works and if possible would love some further help here
I use LINK2SD, and pretty much link all my games, have noticed that the internal memory used increases even when I link to the sd card, so there does indeed appear to be a portion of the game data going to internal ...
Is there an app or a function in LINK2SD to simplify & automate this process to ensure that ALL data links to the SD card ...
I'm not too familiar with the mount option or how to do it ...
Any advice would be most appreciated, thanks

HELP! Problems with new Sandisk 64GB Micro SD

Hi all, this may have been asked a thousand times but I cannot find a definitive answer to this. I bought a 64GB Sandisk Micro SD Class 6 card to use for all my games and stuff. I received it today and tried putting it in my phone. It always shows as damaged card, so I tried the proper steps of pulling down the notification bar, selecting the card and the phone told me it would need formatting, so I clicked format.
But to my dismay the bloody phone formatted the internal USB storage so I lost all my pictures and personal stuff!!!
To add insult to injury, I cannot get this bloody card to format and work no matter what I try. I haven't formatted or partitioned it in my PC, only tried through the phone.
Please, please can anyone help???

Got it sorted. Mods can delete this thread if need be

bigdyl69 said:
Got it sorted. Mods can delete this thread if need be
Click to expand...
Click to collapse
Maybe you should tell how you did it for other people with the same problem. I was also thinking of buying this 64 GB SD-Card and who knows maybe I stumble upon the same problem

Scarface1991 said:
Maybe you should tell how you did it for other people with the same problem. I was also thinking of buying this 64 GB SD-Card and who knows maybe I stumble upon the same problem
Click to expand...
Click to collapse
Sorry, I would have posted it up as soon as I sorted it but I was in a flap trying to get my phone back up and running properly.
What it seems to boil down to is that custom ROMs generally don't format the external SD cards correctly, or so I read somewhere on a thread on XDA (I think it was in the T989 thread or something like that). I used the free EaseUS Partition Manager tool to first remove the partition on the card (64GB formatted to exFAT), then create a new 64GB Fat32 partition. I don't know whether it was necessary but I flashed Samsung standard LP7 Rom to my phone and fully factory reset the phone.
After that was done, I inserted the 64GB card, booted up and went through settings-> storage and erased the SD card to make sure it was formatted correctly for the S2
...and voila
Hope that helps someone out

Get the app undelete to restore your deleted stuff

My SD card was working out of the box with Galaxy S2. I just formatted it and that was it
Just got a Galaxy S3 last week and the same SD was driving me insane with message
SD damaged after copying 59 GB of music to the phone
It was playing music without problem but as soon I restart the phone it would through error SD damaged
After so many tests I just found out that KIES is the one was corrupting my SD card
I tried copying my music with Sandisk data manager, mediamonkey, adding music folders manually and it works flawlessly, restart and not problem
All this app recognize Galaxy S3 quicker than SAmsung KIES, KIES takes a while sometimes to connect to the phone
Hope Samsung update KIES because it doesn't work with GALAXY S3 for uploading 59 gb of music
I was about to send my SD to amazon and get a refund, thanks I didn't do it
Happy days after so many days of testing

Hi guys
I also had the same issue with sandisk 64 gb card but couldnt find any solution n had to get two cards returned.... i dont use kies or any other thing. It also got damaged on first restart after copying 30+gb data on it. Couldnt find a damn solution. Now i have ordered a kingston 64 gb one to c if it makes any difference. Any idea by anyone to check it in a proper manner n maje it properly usable?
Thanks in advance
Sent from my GT-I9300 using Tapatalk 2

Tnx
bigdyl69 said:
Sorry, I would have posted it up as soon as I sorted it but I was in a flap trying to get my phone back up and running properly.
What it seems to boil down to is that custom ROMs generally don't format the external SD cards correctly, or so I read somewhere on a thread on XDA (I think it was in the T989 thread or something like that). I used the free EaseUS Partition Manager tool to first remove the partition on the card (64GB formatted to exFAT), then create a new 64GB Fat32 partition. I don't know whether it was necessary but I flashed Samsung standard LP7 Rom to my phone and fully factory reset the phone.
After that was done, I inserted the 64GB card, booted up and went through settings-> storage and erased the SD card to make sure it was formatted correctly for the S2
...and voila
Hope that helps someone out
Click to expand...
Click to collapse
A million thanks, I wanted to throw away my 64Gb card and I've payed 70$ for it, but after formatting with EaseUS Partition Manager to Fat32 it works just fine I've tried with Windows a 100 times with no results.

EaseUS Partition Manager def did the job!
here comes the weird bit:
connecting the 64gb micro sd with this
{
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
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to my pc shows 29 gb in easeUS.
while inserting it in my phone it shows 59.4 gb
using this type of adapter
and connected to the pc with a sd - to - usb adapter:
http://h10025.www1.hp.com/ewfrf-JAVA/Doc/images/550/c01650840.jpg
it will show 59.4 gb in easeUS as well
does that make any sense at all?

I bought this to put into my Samsung Galaxy S3 and opted for the Sandisk name due to previous purchases and reputation. Many people have said to format the card via the phone before use so I did this, or tried to, but it just kept saying that it was in an incompatible format and the process could not be carried out! Ok, a little frustrating but I thought I'd just use the supplied adapter and format it via my laptop. Similar message from Windows - not able to complete the format, the disc may be corrupted!!! I tried this several times on both the pc and the phone and nothing. Very poor in my opinion and it has been returned for a refund.

Thanks! This really saved my day

I ended up getting a 64gig Sandisk super duper card (or whatever it is called). I plugged it into my computer via a USB adapter, and it worked fine. Then I formatted it in FAT32 with the tool suggested in previous posts, and that worked fine. Then as I was copying stuff over (it was still plugged into the computer, my phone was in USB mode transferring data), the transfer froze. I unplugged it, and it was warm. So I tried again, it worked for a bit, and then would freeze. Not sure what the issue was. So I returned it to Best Buy, and they are sending me a new one. Hopefully this one works.
Any tips or suggestions other than formatting it with that utility? Could it really just have been the card itself?

Got one last night, formatted it using the program suggested, no dice. Getting a "damaged card" notification, nothing I can think of is working.
Formatted on my PC, formatted using a Mac, formatted using a linux terminal, nothing seems to work.
Anyone have any ideas on what else I can do to rectify this issue? :/
Or is it safe to assume that it's a defective card?

Vaesar said:
Got one last night, formatted it using the program suggested, no dice. Getting a "damaged card" notification, nothing I can think of is working.
Formatted on my PC, formatted using a Mac, formatted using a linux terminal, nothing seems to work.
Anyone have any ideas on what else I can do to rectify this issue? :/
Or is it safe to assume that it's a defective card?
Click to expand...
Click to collapse
Hi, know what you're going through. See my post at http://forum.xda-developers.com/showthread.php?t=1698672&page=9
The guiformat tool under the link luigig posted worked great. (I'm too new a member to repost the link here.)
If it doesn't work I suspect you really have a damaged card. There are some known bad batches.

Had an a media scanning issue on my new SGIII (At&T), from my sandisk 64 card. which was previously formated at 32. I used OP's method and so far so good. I also transfered my files to pc and ran defragler on them as i had a media scan issue. I transfrered all pictures with no intent on putting them back since they were from my old atrix. No problems as yet. I will try to transfer from phone to pc to see if i get the freezing. If i do, you will hear back from me. If not THanks OP:good:

try to format it using your pc. (as a FAT32)

format 64GB
What you should do is download a free partitioner program like Easeus Parttition manager. You should make two partitions on your sd card with a max of 32 GB. Format both of them as Fat 32. Once done, put it back in your phone, it is now recognized and you can reformat the card in your phone. It pops up as a 64 GB card now.
Good luck.
bigdyl69 said:
Hi all, this may have been asked a thousand times but I cannot find a definitive answer to this. I bought a 64GB Sandisk Micro SD Class 6 card to use for all my games and stuff. I received it today and tried putting it in my phone. It always shows as damaged card, so I tried the proper steps of pulling down the notification bar, selecting the card and the phone told me it would need formatting, so I clicked format.
But to my dismay the bloody phone formatted the internal USB storage so I lost all my pictures and personal stuff!!!
To add insult to injury, I cannot get this bloody card to format and work no matter what I try. I haven't formatted or partitioned it in my PC, only tried through the phone.
Please, please can anyone help???
Click to expand...
Click to collapse

The ultimate solution !!!!!!!!!!!!!!!!
First u have to use an external card reader coz 99% of the problem is that i mean do not use ur laptop card reader but use a multicards reader coz laptops card reader r not designed for micro sd 64Go once u plug in ur micro Sd u should run a small software BOOTICE ( it's been attached to this post ) , u will see the real size right after in th picture 1
Fist u should update ur exFAT ( look to the attached files)
after that follow the steps on pic 2 , 3 , 4 ...the idea is to reformat ur card with single partition with exFAT and not FAT32 the exFat is an update given with microsoft it's been attached also.
Remember the prob comes from ur card reader and always use an external cards reader like the one used to format ur sdcard ....if u have any other question am here
warm regards

Nice! thx

moad27 said:
First u have to use an external card reader coz 99% of the problem is that i mean do not use ur laptop card reader but use a multicards reader coz laptops card reader r not designed for micro sd 64Go once u plug in ur micro Sd u should run a small software BOOTICE ( it's been attached to this post ) , u will see the real size right after in th picture 1
Fist u should update ur exFAT ( look to the attached files)
after that follow the steps on pic 2 , 3 , 4 ...the idea is to reformat ur card with single partition with exFAT and not FAT32 the exFat is an update given with microsoft it's been attached also.
Remember the prob comes from ur card reader and always use an external cards reader like the one used to format ur sdcard ....if u have any other question am here
warm regards
Click to expand...
Click to collapse
Hi,
Thanks for your idea, but i'm trying to get my SD as FAT32, but i'm having trouble seeing the full card. Is there anything you can suggest? My card is showing up as 27GB when formatted as exfat, it's 59GB (64GB)
My aim is to use an AOSP rom and i am unable to use the exfat file system.
Any help would be greatly appreciated.
Thanks.

Files automatically disappearing from SDCARD

I installed LineageOS 20 (lineage-20.0-20221121-UNOFFICIAL-Mi439) on a redmi 7A (pine version), through TWRP (twrp-3.7.0_12-0-mi439), along with Gapps (NikGapps-full-arm64-13-20230418-signed), and rooted thanks to magisk 26.1.
I installed a brand new (noname) 128GB microsd.
I tried to use the sdcard both as external, or formated as internal (configuration I kept). With external conf I used also App2SD III Pro to move apps to SD.
With both approaches I faced very strange behavior : files (pictures, mp3, docs... but it seems not to appear on apps) disappearing a while after having been transferred, whether this transfer was performed from PC through USB connection, through copy paste from internal memory to external SD, or thanks to FTP connection (using File Manager +).
After a while (minutes or hours by now, not more...) some folders which I expected to contain files appeared as empty when trying to go inside, although some app (like File Manager +) still said that the folder contained the correct number of files, but displayed nothing when going inside. And these folders were then impossible to remove. I tried it in many different ways, through apps, or through adb with the command that should work if empty, as well the ones to use to erase folder + its contents, with force argument. On such folder, I also noticed no difference in permissions compared to working folders.
And after a while these folder removal attempts leaded to a non responding SD card. Which at the end I had to re-format.
I am close to consider this SDcard as the root of the problem, but I would prefer to be sure before re-breaking (again...) all my configuration (which is in fact the one of the phone of my daughter who is beginning to curse me !).
Any idea to confirm this is the origin of the problem, that could work in my current configuration (sdcard formatted as internal), without breaking something else, taking also into account I'm using a windows PC ? I don't imagine a repair is possible, but if a solution exist, I would also be glad to hear.
Thanks a lot for those who had the patience to read everything, and a bigger thank for those who would be eager to help

Format in device. Reload it using the device interface.
Don't share the card with other devices as this can corrupt it unless formatted before using in the new device.

blackhawk said:
Format in device. Reload it using the device interface.
Don't share the card with other devices as this can corrupt it unless formatted before using in the new device.
Click to expand...
Click to collapse
OK I will give it a try as soon as she let me touch her phone To have a status on the sdcard first.
In case it's OK (fingers crossed), what would be the best to extend my internal storage, which is the initial reason for all these operations. App2sd with a unique volume, or partition the sdcard to use with Link2sd ? If partitionning is the best, considering all previous issues, what would be the best way to perform the partition (app to recommend ?) and what would be your advices concerning volumes sizes ? I have 32 GB internal and a SDcard of 128 GB.
I keep you posted on the test.

blackhawk said:
Format in device. Reload it using the device interface.
Don't share the card with other devices as this can corrupt it unless formatted before using in the new device.
Click to expand...
Click to collapse
Re-reading your answer I wonder if you also mean that if I format with my PC you believe it should then be able to work safely as an external device in the phone. Including with app data or maybe app itself linked in the sdcard.
In my various tests I indeed formated as external with the device but accessed it from the external by USB. Which I understand may cause corruption risk.
Anyway I also tried to reformat then with the device, as internal storage this time, and saw issues occurring without sharing it through USB. But I used FTP feature from File Manager +. Does it bring the same risks as direct USB connection ?

Always back to basics, have you tried with another SD card to make sure (as you mentioned possibly) that the card is kaput?

Zitouun said:
OK I will give it a try as soon as she let me touch her phone To have a status on the sdcard first.
In case it's OK (fingers crossed), what would be the best to extend my internal storage, which is the initial reason for all these operations. App2sd with a unique volume, or partition the sdcard to use with Link2sd ? If partitionning is the best, considering all previous issues, what would be the best way to perform the partition (app to recommend ?) and what would be your advices concerning volumes sizes ? I have 32 GB internal and a SDcard of 128 GB.
I keep you posted on the test.
Click to expand...
Click to collapse
I would never use the SD card to extent internal memory. That's just asking for trouble and slow performance.
Use the expandable storage as a data drive; all critical data goes here. Only apps and the download folder go on internal, the DCIM folder too if you have room there.
Buy name brand flash memory for reputable vendors. Go for fast V30 rated cards like the Sandisk Extreme. A flash memory failure wastes time, money and data.

Zitouun said:
brand new (noname) 128GB microsd...
I am close to consider this SDcard as the root of the problem
Click to expand...
Click to collapse
I'd guess that, too.
You might want to check how good/unfake/fast your SDCard really is:
https://alternativeto.net/software/h2testw/about/
or its equivalent for linux
https://alternativeto.net/software/f3/about/
It fills your card with unique files and reads them, thus you will easily spot fake drives and you'll know how fast they actually are.
Such complete write means quite some stress and writing will be throttled after some time but you will get information proper:
Average writing speed: 30.57 MB/s
...
Data OK: 238.31 GB (499776000 sectors)
Data LOST: 0.00 Byte (0 sectors)
Corrupted: 0.00 Byte (0 sectors)
Slightly changed: 0.00 Byte (0 sectors)
Overwritten: 0.00 Byte (0 sectors)
Average reading speed: 89.33 MB/s
No name and cheap brands or cheap models of good brands will cause trouble rather sooner than later: Try to go for high end cards that have a good writing speeds advertised (check for some proof online beforehand!). Even if this means that you can afford only half the size, you will be far better off.
Story: A friend of mine has a dash cam and he complained that it always screws up, no matter how big or what brand the card is. I told him to get a card with the highest writing speed he could get. Half a year later he reported back that all issues with the dash cam were resolved.

It's a V30 class 10, but from a French distrib Boulanger (it's a real multimedia shop name !), badged under their own "essentiel b" mark.

Zitouun said:
V30
Click to expand...
Click to collapse
Same like mine from the testing above, that should be 30MB/s at least. Wiki has actually a nice listing:
https://en.wikipedia.org/wiki/SD_card#Class
If you have a decent card reader (laptop?) you could test, too Ideally you should still have warranty, just in case something goes awry
Alternatively, perhaps another ROM would work better (and thus proving the cards are okay).
PS: Hehe, catchy name - I just hope their cards are not made of Boulangerite

Test just performed with H2testw, no issue found. I'm re-running a verif to see if after a few hours no retention issue occur.
Warning: Only 118872 of 118876 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 14.0 MByte/s
Reading speed: 14.6 MByte/s
H2testw v1.4
Anyway I see here that this card is not as fast as expected. It was branded for 90MB/s in read which is not the reality.
I will try to get it refunded. And in parallel I ordered a Sandisk Extreme V30 U3 class 10, branded for A2 applicative perfs, allowing 90MB/s in write and 190MB/s in read. It should be night and day.
I keep you posted for next tests in the phone, probably this WE.

Zitouun said:
Test just performed with H2testw, no issue found. I'm re-running a verif to see if after a few hours no retention issue occur.
Warning: Only 118872 of 118876 MByte tested.
Test finished without errors.
You can now delete the test files *.h2w or verify them again.
Writing speed: 14.0 MByte/s
Reading speed: 14.6 MByte/s
H2testw v1.4
Anyway I see here that this card is not as fast as expected. It was branded for 90MB/s in read which is not the reality.
I will try to get it refunded. And in parallel I ordered a Sandisk Extreme V30 U3 class 10, branded for A2 applicative perfs, allowing 90MB/s in write and 190MB/s in read. It should be night and day.
I keep you posted for next tests in the phone, probably this WE.
Click to expand...
Click to collapse
On N10+ it transfers from internal to card at around 3-4gb @min.
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Zitouun said:
Writing speed: 14.0 MByte/s
Reading speed: 14.6 MByte/s
Click to expand...
Click to collapse
Weird that both values are so close to each other - usually I see read way higher than write. Could there be something else limiting? (but then write shouldn't be lower at all with a V30 which means sustained minimum of 30MB/s)
Wow! 90MB/s write and A2 sounds certainly like a good card. Looking forward to your new card!
@blackhawk Thanks! I was already wondering which program I could use on android...
I have a Kingston MobileLite G4
https://www.legitreviews.com/kingston-mobilelite-g4-usb-3-0-card-reader-review_158647
Was looking sometimes for a replacement but never found anything good - too bad Kingston stopped selling this very wonderful gem

Hello, some news of the topic :
I received the new sdcard and tested it the same way as the previous one... same perfs. So I guess the bottleneck of the test is very probably my PC / USB port / card reader adapter path.
I decided anyway to use the new card, that I tested with the phone with a specific app to test it. Better results : around 90MB/s in write, but also in read. Again there could be another limitation than the card itself, read perfs should be better.
I decided to give a chance to the old card, but didn't tested it yet.
I first tried to again (I know it's not recommended) to use the new sdcard configured as portable device. But I soon realised it's not possible this way to extend the internal memory for applications installs.
So came back to a test of sdcard formatted as internal. But the behavior in this mode in really strange, and not stable :
The system storage settings correctly sees both memories, internal and sdcard, with their correct sizes. Anyway it can't be used for files exploration or operations.
App2SD sees the cumulated memory (here 32GB internal + 128GB SDcard), and allows to move the apps to the SDcard. Which I did.
But other file managers (File Manager+, ES Explorer, EX explorer, Google Files...) all only see 32GB. So I basically have no mean to master the place where something is. No capacity to move something from internal to sdcard.
I tried then to restart the phone thinking it could solve the problem. But after the restart, the SDcard didn't mount normally. All apps were gone, and when finally the sdcard has been detected it was said as corrupted, needing to be reformatted... which I didn't.
I tried another restart, and at this one the sdcard was properly detected, and all apps back. But no improvement on all previous limitations.
So I learned why this mode is really not recommended. Not stable at all.
So came back to a new formatting of the sdcard, with the phone, as external (portable), after having cautiously re-moved all apps with app2SD to internal memory. It worked and I didn't lost anything.
So today I use the sdcard like this, and I'm able to access it from my PC directly through FileManager+ FTP server. No issue encountered so far.
Anyway I'm bit pissed off to understand it's not longer possible to extend in a stable way the internal memory of the phone, including for apps installs, like I used to do on my first smartphone (a Galaxy Ace with 512MB internal memory...), properly rooted, which CyanogenMod + Link2sd allowed me to use a lot longer than reasonable.
Thanks for the help !

Zitouun said:
pissed off to understand it's not longer possible to extend in a stable way the internal memory of the phone
Click to expand...
Click to collapse
Oh gee, I feel a bit sorry for the long journey and just end up at a crappy place.
Well, last time I tried to extend memory this way I was angry about the limitations of internalizing SD cards: No resizing but only 100%, no choice of cipher and difficult to access it without Android running. I managed the resizing and accessing but in the end I decided for portable memory (on 512GB card) like for music, films and several wiki (kiwix). Also I'd go for a phone with no less than 64GB flash built in already (and no more internalizing SD cards).
Sad to see that it hasn't improved but hey! at least we had some fun figuring it out, was a pleasure to meet you!

SigmundDroid said:
Oh gee, I feel a bit sorry for the long journey and just end up at a crappy place.
Well, last time I tried to extend memory this way I was angry about the limitations of internalizing SD cards: No resizing but only 100%, no choice of cipher and difficult to access it without Android running. I managed the resizing and accessing but in the end I decided for portable memory (on 512GB card) like for music, films and several wiki (kiwix). Also I'd go for a phone with no less than 64GB flash built in already (and no more internalizing SD cards).
Sad to see that it hasn't improved but hey! at least we had some fun figuring it out, was a pleasure to meet you!
Click to expand...
Click to collapse
For internal memory you should have at least 256gb. You will also want a SD card slot.
If either is missing it limits you greatly. The SD card is never used to extend internal memory; it's used as a data drive. A V30 rated card fills this role perfectly.
The internal memory is many times faster with a huge bandwidth by comparison. Use the right tool for the job.
This is the internal memory speed test for the N10+ vs the previous speed test I posted here for the V30 rated Sandisk Extreme SD card. Night and day difference.

blackhawk said:
For internal memory you should have at least 256gb. You will also want a SD card slot.
If either is missing it limits you greatly. The SD card is never used to extend internal memory; it's used as a data drive. A V30 rated card fills this role perfectly.
The internal memory is many times faster with a huge bandwidth by comparison. Use the right tool for the job.
This is the internal memory speed test for the N10+ vs the previous speed test I posted here for the V30 rated Sandisk Extreme SD card. Night and day difference.
View attachment 5902269
Click to expand...
Click to collapse
Impressive indeed !

SigmundDroid said:
Sad to see that it hasn't improved but hey! at least we had some fun figuring it out, was a pleasure to meet you!
Click to expand...
Click to collapse
Same !