Develop Bugs

Strange SD Card problem

I had a strange problem happen to my SD Card on my SG3. I have a Patriot 16GB class 10 card that I used on my EVO 4G for a almost 2 year without a problem. After when I got my new phone I clean all folders that I no longer needed except my pictures and some applications. Put the card in my SG3 and everything was OK. I was able to copy files take a pictures and everything seems to work the way it should. Last week I was on a trip and during the process to taking a picture I got a message that my card was removed and basically disappear. I reboot the phone and nothing happen. then a little bit later I saw another message that card was found and everything show up again. Then I check do I have all the pictures and most of them were there except on a last one was (when card disappear) basically it was look like that picture was taken a half way. So I delete that bad picture and continue. A day later it happen again but this time when card show up again instead a normal card I have that message in notification bar with a little sd card that it says Blank SD card. then if I pull down and click on it phone is asking me to format the card. I try to mount the card but got the same message Blank card or unsupported file system. Ok so I didn't have at that time my adapter to plug in to my laptop and wait until I got home to try to repair the card.
Here is what I got now and I'm not sure is phone damage the card or card slot on the phone is not good.
I use minitool under windows and GParted as well under linux. Both of them recognize my card as 60 GB Unallocated space (it is a 16GB). when I try to recreate or format both of them said successful but card is not show up. I have to plug it back and then it goes again as a 60GB unallocated space.
Does any one know how to format a 16GB card as FAT32? I mean the settings I have to use to put to get back again this card as a 16GB not as 60GB.
Sorry for the long explanation and thanks for you help in advance.
P.S. I' not rooted and on LG8 update.

Bro,did to trid any other sd?
sent from my htc

ventzi said:
I had a strange problem happen to my SD Card on my SG3. I have a Patriot 16GB class 10 card that I used on my EVO 4G for a almost 2 year without a problem. After when I got my new phone I clean all folders that I no longer needed except my pictures and some applications. Put the card in my SG3 and everything was OK. I was able to copy files take a pictures and everything seems to work the way it should. Last week I was on a trip and during the process to taking a picture I got a message that my card was removed and basically disappear. I reboot the phone and nothing happen. then a little bit later I saw another message that card was found and everything show up again. Then I check do I have all the pictures and most of them were there except on a last one was (when card disappear) basically it was look like that picture was taken a half way. So I delete that bad picture and continue. A day later it happen again but this time when card show up again instead a normal card I have that message in notification bar with a little sd card that it says Blank SD card. then if I pull down and click on it phone is asking me to format the card. I try to mount the card but got the same message Blank card or unsupported file system. Ok so I didn't have at that time my adapter to plug in to my laptop and wait until I got home to try to repair the card.
Here is what I got now and I'm not sure is phone damage the card or card slot on the phone is not good.
I use minitool under windows and GParted as well under linux. Both of them recognize my card as 60 GB Unallocated space (it is a 16GB). when I try to recreate or format both of them said successful but card is not show up. I have to plug it back and then it goes again as a 60GB unallocated space.
Does any one know how to format a 16GB card as FAT32? I mean the settings I have to use to put to get back again this card as a 16GB not as 60GB.
Sorry for the long explanation and thanks for you help in advance.
P.S. I' not rooted and on LG8 update.
Click to expand...
Click to collapse
Windows will format it just fine under Disk Management. The fact that its reading it as a 60GB... I'd bet on the card as bad. I have hours and hours trying to save thumb drives and SD cards. 97% of them had no hope. Sometimes the card reader can act up... but not likely, and the phone's kicking it out too. Try to stick with Kingston or SanDisk even if you have to pay a little more. Yes, Cards do go bad like that.

a454nova said:
Windows will format it just fine under Disk Management. The fact that its reading it as a 60GB... I'd bet on the card as bad. I have hours and hours trying to save thumb drives and SD cards. 97% of them had no hope. Sometimes the card reader can act up... but not likely, and the phone's kicking it out too. Try to stick with Kingston or SanDisk even if you have to pay a little more. Yes, Cards do go bad like that.
Click to expand...
Click to collapse
Thanks for the reply. It is look like that this card is going bad. It kind a surprise me since I didn't have any problems under my old phone. I will play a little bit more to try to repair it but....... looks like will be a lost a time.
Do you think that because it was a class 10 card causing a issue? I saw a couple treads but most of the SD card that people use are class 4.

ventzi said:
Thanks for the reply. It is look like that this card is going bad. It kind a surprise me since I didn't have any problems under my old phone. I will play a little bit more to try to repair it but....... looks like will be a lost a time.
Do you think that because it was a class 10 card causing a issue? I saw a couple treads but most of the SD card that people use are class 4.
Click to expand...
Click to collapse
I don't think the class would be an issue. How old is your card?

The Root said:
I don't think the class would be an issue. How old is your card?
Click to expand...
Click to collapse
Probably 1.5 year. I got my EVO 4G back in sept. 2010 and bought the card a couple months later when rooted my phone.

Yeah, like root said, the class wasn't the issue. The different phone might have pissed it off but you really never know. I never liked Patriot myself, but then some people like them. Gotta back stuff up or have it auto upload somewhere.

a454nova said:
Yeah, like root said, the class wasn't the issue. The different phone might have pissed it off but you really never know. I never liked Patriot myself, but then some people like them. Gotta back stuff up or have it auto upload somewhere.
Click to expand...
Click to collapse
I do have all the pictures auto uploaded to my DropBox account and all apps I backup on my PC. I just wondering if the card slot of the phone is bad. I have a new 4GB class 4 card. I will put in to the phone, format and try to see if it happen again.

last week suddenly received a message that the card was blank. did everything i could not to format it. finally gave in and tried formatting the sd card but couldn't. had to buy a new one. sounds like yours is going bad as well.

also try this thread as it has helped many
http://forum.xda-developers.com/showthread.php?t=1355528

a454nova said:
Yeah, like root said, the class wasn't the issue. The different phone might have pissed it off but you really never know. I never liked Patriot myself, but then some people like them. Gotta back stuff up or have it auto upload somewhere.
Click to expand...
Click to collapse
When I first got my SGS3 I used my old card from my OG Droid. I got an OTA update and my phone quit working (I got the "Unfortunately the process com.android.phone has stopped working" message). I took the phone back and they asked if I had ever had an SD card in it. I said "Yes, my old card from my Droid." I was told that this is a "known issue" with the SGS3 and that any SD card I used should be formatted in the phone itself. I'm not sure if this is the issue here, but it might be.

ventzi said:
I do have all the pictures auto uploaded to my DropBox account and all apps I backup on my PC. I just wondering if the card slot of the phone is bad. I have a new 4GB class 4 card. I will put in to the phone, format and try to see if it happen again.
Click to expand...
Click to collapse
I bet it will be fine. Only one why to know.
Sent from my SPH-L710 using Tapatalk 2

a454nova said:
I bet it will be fine. Only one why to know.
Sent from my SPH-L710 using Tapatalk 2
Click to expand...
Click to collapse
I hope so. Thanks for you help.
P.S. I did play with couple more tools but unfortunately no luck at all. It is time to look for a new one.

32 GB SanDisk Ultra class 10 will not read

This card used to work regularly for about 4 months then one day my phone said it dismounted and it became defective since that notification. I returned it due to the warranty and got a a brand new card from SanDisk. My computer reads it (and I formatted to FAT32) but, my phone refuses to even see it. And yes I attempted to format within the phone in the settings and it doesn't even say its mounted. Any possible suggestions? I tried everything it seems like. Thanks

well what rom and kernel are you running? that helps.
is it only that card or any card?
have you looked for any dirt or crud in the sd card slot. try blowing into there.
are you sure you have the card clicked in all the way? past the point where it springs back?

Here's another suggestion. Load a new rom @asop or touchwiz and if everything but your phone detects it still then you probably have a defective card reader.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

There is a thread on the forum about this very issue. Android runs a system thresd called media server and it runs every once in a while. When it is running, it will thoroughly thrash your sd card, by reading and writing. You can notice this behavior when you boot or reboot your phone; your phone is sluggish and laggy for the first few minutes-media server is running, reading the entire contents of your internal and external storage AND writing a new databse of what it finds.
This unnecessary thrashing dealt by the media server results in eventual ruination of solid state memory cards.
You can disable the media server by instaling and running an app called rescan media root. You have to root your phone to use it.
Sent from my SAMSUNG-SGH-I747 using xda premium
---------- Post added at 09:11 AM ---------- Previous post was at 08:56 AM ----------
Media scanner, not media server. My bad.
It's too early in the morning here in sunny california.
Sent from my SAMSUNG-SGH-I747 using xda premium

TRusselo said:
well what rom and kernel are you running? that helps.
is it only that card or any card?
have you looked for any dirt or crud in the sd card slot. try blowing into there.
are you sure you have the card clicked in all the way? past the point where it springs back?
Click to expand...
Click to collapse
It randomly began to work one day when I inserted it again. But occasionally when I turn on my screen, it says "Preparing sd card". It is a brand new Sandisk card so it doesnt appear to have anything wrong with it physically. It works for now but I'm afraid it may not function soon. I believe Sandisk class 10 sd cards have had trouble in some Galaxy S3 devices similar to mine. Any other ideas?

aval1392 said:
It randomly began to work one day when I inserted it again. But occasionally when I turn on my screen, it says "Preparing sd card". It is a brand new Sandisk card so it doesnt appear to have anything wrong with it physically. It works for now but I'm afraid it may not function soon. I believe Sandisk class 10 sd cards have had trouble in some Galaxy S3 devices similar to mine. Any other ideas?
Click to expand...
Click to collapse
The same thing happened to my friend, and it turned out the replacement SD Card was also defective. Have you tried Card swaps with another device to verify?

Ext SD Card Not Recognized

Like the title says, picked up an SD card, doesn't show up under the Storage menu or when I connect to PC via USB. I've downloaded an app that lets me format the SD and it shows up there, but after formatting I still can't access or even see that the SD card in installed.
It's a GSKILL class 10 64gb SDXC

Hmmmm. Have you tried a different card to see if you get the same results? I'm using a Lexar 633x 64Gb card. No problems to report so far.

Retarded Timing said:
Hmmmm. Have you tried a different card to see if you get the same results? I'm using a Lexar 633x 64Gb card. No problems to report so far.
Click to expand...
Click to collapse
Just tried, thus SD card works in my S5 but not my g3, and another SD card same manufacturer doesn't work on g3.
Sent from my LG-D851 using XDA Free mobile app

I wonder if you're formatting it in a way the G3 doesn't like.

Retarded Timing said:
I wonder if you're formatting it in a way the G3 doesn't like.
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Click to collapse
Well I'm not formatting like anything. Went straight from the packaging to my phone, then to my S5 and that's it
Sent from my LG-D851 using XDA Free mobile app

maybe you got a broken pin in the micro sd slot

F4M0U569 said:
maybe you got a broken pin in the micro sd slot
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Click to collapse
Can't be the case because the SD card shows up in formatting apps from the play store.
Sent from my LG-D851 using XDA Free mobile app

I have a Samsung 32 GB micro SD card. Says 10 HC on it. It worked immediately when I popped it in and I didn't have to format it or anything. Has all my previous files on it.
Sent from my LG-D851 using Tapatalk

I am having the same problem with a dual sim D858 G3.
Have tried Sony, Samsung, Sandisk MicroSDXC cards of various capacities, none work.
Anyone have a solution ?

Hmmm, investigation with a torch and loupe revealed that one of the MicroSDXC reader pins were bent down.
Managed to lift it with a needle and now it works fine.
This was on a new phone, wonder if other people's problems had a similar cause ?

Format the SD Card in storage settings. It should format and be useable

Try couple things:
1. Try (may be borrow from a friend if you don't have one lying around) a different brand name card. Some generic brand cards (especially from eBay) are little flimsy and does not provide proper contacts. It happened to me on both HTC M8 and LG G3. Tried SanDisk card and all went well.
2. Try formatting the card using PC into Fat 32 format (you can always reverse this formatting to ex-fat) and see if this make any difference.
3. This one sounds very basic but under storage, sometime you have to manually click on "mount SD card".
Good luck!

Ok try this
1- but it in lapttop slot (card reader of laptop ) dont try another way .
2- use SDformatter 4 .
3- ok now put it in your device.
I hope it will work properly
Sent from my LG-D855

I have this problem too. April 2017 and LG STILL haven't sorted it out. Impossible for so many owners to have faulty phones. Definitely a SOFTWARE issue ! Terrible customer service. I actually NEED to use an SD card in my work. .Never getting an LG phone again.

Redman7164 said:
I have this problem too. April 2017 and LG STILL haven't sorted it out. Impossible for so many owners to have faulty phones. Definitely a SOFTWARE issue ! Terrible customer service. I actually NEED to use an SD card in my work. .Never getting an LG phone again.
Click to expand...
Click to collapse
Have spoken to a repair shop and what they said is that this is a typical issue with the LG G3, another one (which I also see a lot) is spontaneous reboots, even when the phone is seemingly doing nothing. And these issues get only worse over time. The only way to solve them is to replace the mainboard, which probably isn't worth it. Looked at alibaba.com, they are around 30-40 USD. I have reflashed the stock firmware in my futile attempts to get both issues solved, but it is obviously a hardware issue.

Yeah stopped working too. I've noticed an issue with a pin in the MicroSD card slot. I imagine this is the issue. I'll open it up when I have time.

Take the card out, insert it in a PC and check it for errors. DiskGenius or MiniTool Partition Wizard can help you here. DiskGenius can also check for partition table errors.
Also make sure the card is formatted exFAT, not FAT32 or NTFS and that the cluster size is either 8K or 128K.
If that doesn't work back up your files, format as exFAT with 128K cluster size, then copy the files back. You may have to do this anyway if a partition table error is detected.

[Q] SD Card Issue (Yes, still not solved)

For the longest time, I have been unable to use my 128GB Sandisk MicroSD card properly with my GN4. I have tried SD card fixes, foldermount, and messed with the platform.xml file as well. What I used to do back in the days of ICS/Pre KitKat 4.4.4 was take the SD card and plug it into my computer (via SD card adapter) and transfer the files I needed directly since it takes a while longer if I connected the phone to the computer. I can still transfer files to the microSD card if I plug it in, but they are not able to be read. This is starting to piss me off as I have a lot of music that I would like to store on the card. Anyone have anything else they can suggest?
I used foldermount last week - Some of the music files work properly, while some don't play and I get the message "unable to play this file."
I bought this card brand new and I'm hoping it's not "a bad card"

frazy said:
For the longest time, I have been unable to use my 128GB Sandisk MicroSD card properly with my GN4. I have tried SD card fixes, foldermount, and messed with the platform.xml file as well. What I used to do back in the days of ICS/Pre KitKat 4.4.4 was take the SD card and plug it into my computer (via SD card adapter) and transfer the files I needed directly since it takes a while longer if I connected the phone to the computer. I can still transfer files to the microSD card if I plug it in, but they are not able to be read. This is starting to piss me off as I have a lot of music that I would like to store on the card. Anyone have anything else they can suggest?
I used foldermount last week - Some of the music files work properly, while some don't play and I get the message "unable to play this file."
I bought this card brand new and I'm hoping it's not "a bad card"
Click to expand...
Click to collapse
I also use a 128gb Sandisk Card, the "ultra" I believe. I never had a problem with it, I just came from the Note 3 and put it in the Note 4 with no issues. Is yours the "Ultra" also?

Maybe a bad card. I got 3 fake ones on eBay before I got a real one. I flipped out on the sellers and reported them. Each time I got a bad one I spent hrs copying data over to the 128. I would copy over around 20 gb, and another 20 and so on. When I went to look at the files that I had first put on there they would be gone. There are programs u can download for free. Just Google how to tell if sd card is fake. A fake card is really a 2/4/8/16/32 card changed to look and act like a 128 and once it hits it's limit that u don't know what that is, the earlier data that was put on the card, disappears.
Here is a link for a program I used:
http://forum.xda-developers.com/showthread.php?t=730285
This happened to me back in Oct/Nov when note 4 was launched. I ended up paying $120 on eBay for SanDisk's highest r/w 128 gb card.
The first seller claimed he didn't know they were fake and promised to stop selling them if I retracted my bad feedback as it was the only bad feedback he had ever received. Once I saw they were removed from his selling list I retracted the feedback. The second and third sellers I was not nice to, did not even have to send them back the pos card. My response was something like refund my ****ing money now for selling me this fake ****ing sd card. Ten minutes later both had gave me my money back. Assholes. After I got a good one I had contacted the first seller again and explained how much trouble I had and the scam artists there are on eBay. I feel that he was genuinely sorry and had no idea. He also stopped doing business with who he was getting the fake cards.
This good card has been great, note 4 32 gb internal, 128 external, both full, zero problems.

Plug it into your computer and check if it's formatted correctly (fat32 vs NTFS). That might solve the problem. Don't quote me, but I think it needs fat32.
Sent from my SM-N910P using Tapatalk

pdaddy said:
Plug it into your computer and check if it's formatted correctly (fat32 vs NTFS). That might solve the problem. Don't quote me, but I think it needs fat32.
Sent from my SM-N910P using Tapatalk
Click to expand...
Click to collapse
Yes it does need to be fat 32.
Also if is fake, u might format it, move data, insert in phone, and it says it's not readable and needs to be formatted.

Yes mine is the ultra version as well (in red letters on the micro sd card)

ryanalan82 said:
Yes it does need to be fat 32.
Also if is fake, u might format it, move data, insert in phone, and it says it's not readable and needs to be formatted.
Click to expand...
Click to collapse
the two options are exFAT and NTFS. I formatted on exFAT and it seemed to be working just fine until today.
So I use my sd card as direct storage for when pictures are taken. I was at dinner today and took pictures of the food we ate. All of a sudden when I go to the Gallery, I see a black and grey image with an exclamation point for the pictures taken at dinner with the exception of one. I am wondering whether Samsung/Google is releasing updates that put the phone back into the main issue of not being able to R/W to the external sd card? I don't know what else could be the reason. I also tested the card to make sure it wasn't fake. SO DAMN FRUSTRATING!

Shouldn't have to format it. Already exfat when it comes. If it's real, contact sandisk with pictures of the card and it's serial number and a copy of the receipt. They will replace it.

SD card unexpectedly removed

Just received my unlocked 10, t-mobile. Put my 128gb sandisk card in and it works fine, but I keep getting a notification that the SD card is unexpectedly removed. Tried reseating it, still get it. Anyone else?

I put a 200gb sandisk on my htc 10 and no problems so far.
Sent from my iPad using Tapatalk

Maybe I'll try reseating it again

Still no luck, might need to reformat it

metalfan78 said:
Still no luck, might need to reformat it
Click to expand...
Click to collapse
Could be a defective card too. Or even the reader. My 128 Samsung hasn't made a peep so far.
Sent from my HTC6545LVW using Tapatalk

It worked fine the other day, I've had it for awhile. I think I'll try a reformat and see what happens. I'll let you guys know. Thanks.

My PNY 128GB has been doing that too. It would show the message and when I check on it, sure enough, it's unmounted. So I took it out and formatted it in another phone and it's slightly better. I get the unmounted message, but the card stays mounted. I'll probably try a different card tomorrow.

I have same issue with my Samsung 128gig card. Random unmounted status.
HTC 10

@dottat @protoadies01 Is it possible for you guys to provide the exact model numbers for your Samsung cards for comparison sake? It may help rule out defective device and/or card. My PNY card is the P-SDUX128U160G-GE model.

Ravenmtx said:
@dottat @protoadies01 Is it possible for you guys to provide the exact model numbers for your Samsung cards for comparison sake? It may help rule out defective device and/or card. My PNY card is the P-SDUX128U160G-GE model.
Click to expand...
Click to collapse
Same card, same problem.

Howdo i format the card before I insert it as I would like to copy stuff onto it. Guessing exfat but what allocation size?
Sent from my LG-D855 using XDA-Developers mobile app

Update: I bought a Sandisk 64GB. Model #SDSQUSC-064G-AN6TN. No problems at all
gsw5700 said:
Howdo i format the card before I insert it as I would like to copy stuff onto it. Guessing exfat but what allocation size?
Sent from my LG-D855 using XDA-Developers mobile app
Click to expand...
Click to collapse
exFAT Default allocation should be fine, but you can just format it in the phone. If you run into issues, try FAT32. If you still run into issues, try another card.

I'm going to try a reformat today, see if it works

I've been on a clean reformatted card for about 2 hours now, so far no error. I haven't loaded back up yet though.

My pny only gave me problems when I was writing a lot or something big to the card.

I swapped mine out of 4 different phones, then into this one, so it's no wonder it errored

I have a Lexar Professional 128GB Class 10 and am now getting the same problem.
It has been fine all week but all of a sudden from yesterday morning it has started playing up.
I have tried RE seating and it works for a little while then complains.
I have also found just restarting wakes the card up for a little while so am wondering if it is software related rather than physical?

I don't know, I did a full reformat on my laptop, then formatted it on my phone and haven't had any problems since.

metalfan78 said:
I don't know, I did a full reformat on my laptop, then formatted it on my phone and haven't had any problems since.
Click to expand...
Click to collapse
Did you reformat as internal memory or just a standard format?
Sent from my HTC 10 using Tapatalk
---------- Post added at 12:40 PM ---------- Previous post was at 12:13 PM ----------
metalfan78 said:
I don't know, I did a full reformat on my laptop, then formatted it on my phone and haven't had any problems since.
Click to expand...
Click to collapse
I just tried reformatting mine in my phone as internal memory, but it is failing to recognise the card as U3 which it is supposed to be.
Sent from my HTC 10 using Tapatalk

I did it as external.