[Q] V510 lollipop sd card problem - G Pad 8.3 Q&A, Help & Troubleshooting

Hello,
I just upgraded my gpe g pad to lollipop and am having SD card problems. My 64gb card worked perfectly with kk with the SD fix. In lollipop under settings, my card is listed correctly but when using solid Explorer or root explorer, the card is not listed when the doc viewer is displayed to give the program permission. I tried with an old 16mb card and that is listed. Was hoping lollipop fixed SD issues but doesn't seem like it. Does anyone have a solution or the same problem? I tried it with two 64gb cards both formatted exfat.

dcpyro1394 said:
Hello,
I just upgraded my gpe g pad to lollipop and am having SD card problems. My 64gb card worked perfectly with kk with the SD fix. In lollipop under settings, my card is listed correctly but when using solid Explorer or root explorer, the card is not listed when the doc viewer is displayed to give the program permission. I tried with an old 16mb card and that is listed. Was hoping lollipop fixed SD issues but doesn't seem like it. Does anyone have a solution or the same problem? I tried it with two 64gb cards both formatted exfat.
Click to expand...
Click to collapse
Try fat32, and the permissions trick.

sleekmason said:
Try fat32, and the permissions trick.
Click to expand...
Click to collapse
Thanks. It works with fat32. Shame exfat isn't supported on larger sized cards

Actually, I think the problem is because you upgraded the bootloader. Once you update the bootloader, the sdcard needs to be reformatted. Exfat might even actually still work too if the sdcard just reformatted again. I haven't tried to reformat using exfat after updating the bootloader.

Deltadroid said:
Actually, I think the problem is because you upgraded the bootloader. Once you update the bootloader, the sdcard needs to be reformatted. Exfat might even actually still work too if the sdcard just reformatted again. I haven't tried to reformat using exfat after updating the bootloader.
Click to expand...
Click to collapse
Why would you need to reformat with a different boot loader?
Anyway, I had no problems switching back and forth from KitKat to lollipop using fat32. Exfat is poorly supported. Like ntfs, there are constraints that make it more of an issue than its worth.
Why ext2 isn't supported out of the box is beyond me.

I think the bootloader affects how the files are written to the partitions, including the sdcard. If you think about when everyone said the problems started, it was when 4.4.2 was released.
I tried an experiment. I had cm11 with 20B bootloader installed. It was fine for a week. I then only updated my bootloader to 20D and within a day it started to randomly reboot.
I then kept the 20D firmware and reinstalled cm11 and reformatted my sdcard. After that, the device was fine again. But, the problem with rebooting still happened even after reinstalling cm11 until I reformatted the sdcard while using the new bootloader.
When we update the bootloader, we directly reboot into the recovery to reinstall the operating system. This formats everything except the sdcard. This is why the problems are happening with the sdcard, because it's the only thing not being formatted over.

Deltadroid said:
I think the bootloader affects how the files are written to the partitions, including the sdcard. If you think about when everyone said the problems started, it was when 4.4.2 was released.
I tried an experiment. I had cm11 with 20B bootloader installed. It was fine for a week. I then only updated my bootloader to 20D and within a day it started to randomly reboot.
I then kept the 20D firmware and reinstalled cm11 and reformatted my sdcard. After that, the device was fine again. But, the problem with rebooting still happened even after reinstalling cm11 until I reformatted the sdcard while using the new bootloader.
When we update the bootloader, we directly reboot into the recovery to reinstall the operating system. This formats everything except the sdcard. This is why the problems are happening with the sdcard, because it's the only thing not being formatted over.
Click to expand...
Click to collapse
Wild. You wouldn't think it would matter. You could test this by taking out the sdcard before upgrading if it is a read problem with the card. I'm more inclined to think it's a problem with the initial read by cyanogenmod on a card with used space. Does this happen on stock as well?
The OP has the 510 by the way. But this is very interesting.

Yes, this happens with all ROMs AFAIK. The ROM and kernel made no difference.
Edit: even updating the ROM to lollipop from KitKat did not fix the crashing. Only after reformatting the sdcard and copying the data back onto the sdcard stopped the crashing.

Deltadroid said:
Yes, this happens with all ROMs AFAIK. The ROM and kernel made no difference.
Edit: even updating the ROM to lollipop from KitKat did not fix the crashing. Only after reformatting the sdcard and copying the data back onto the sdcard stopped the crashing.
Click to expand...
Click to collapse
Does it happen when formatted fat32?
I could see only a few reasons that are even possible. One being that when you replace the boot loader it wipes the internal sdcard, and the ext sdcard but because our ext sdcard is separate from the device, and not just a separate partition, it can't remove the files and marks it as defective.
If you mount it manually using a terminal does it work?
Mount /storage/sdcard1 (as root)
And third, that it is a glitch in exfat, where something isn't getting passed correctly.
Sounds more like a bug than a security feature, but could also be that to keep something malicious from running.

Yes, the problem still happens when the sdcard is formatted as fat32. Simply changing the bootloader will still trigger the problem.
For testing purposes, I made separate installers for 20B and 20D bootloaders that don't touch any other partitions. After I install a new bootloader, I reboot into the recovery again to load the new firmware and then install my ROM (which formats the system partition during normal upgrade procedure).

Related

TWRP wont recognize ext sd card after factory reset and wipe HELP PLEASE!

OK- I am not new here.... been away for awhile but. I recently rooted both of my lg optimus g pro e980 from ATT. I followed the directions on a few threads regarding this procedure. I installed twrp 2.6.3.0 and ran the updates that I could. I installed freegee pro as well. After I did this I also installed CWM recovery and made sure I updated it as well. I made a backup as I always have before I factory reset and I saved it to my external sd card.
I downloaded several roms to flash and gapps and a few other things i found that I liked and saved these to my ext sd card. I used astro file manager and root explorer to verify that the files were on the external sd card.
After the backup using cmw recovery I went into twrp. I did a factory reset per the instructions and after the reset I can't see my external SD card. I have tried EVERYTHING. I dug into every folder I could. I tried rebooting and seeing if I can see the external card from my pc. I cannot see it anywhere.
Can someone PLEASE help me out.
da9b16 said:
OK- I am not new here.... been away for awhile but. I recently rooted both of my lg optimus g pro e980 from ATT. I followed the directions on a few threads regarding this procedure. I installed twrp 2.6.3.0 and ran the updates that I could. I installed freegee pro as well. After I did this I also installed CWM recovery and made sure I updated it as well. I made a backup as I always have before I factory reset and I saved it to my external sd card.
I downloaded several roms to flash and gapps and a few other things i found that I liked and saved these to my ext sd card. I used astro file manager and root explorer to verify that the files were on the external sd card.
After the backup using cmw recovery I went into twrp. I did a factory reset per the instructions and after the reset I can't see my external SD card. I have tried EVERYTHING. I dug into every folder I could. I tried rebooting and seeing if I can see the external card from my pc. I cannot see it anywhere.
Can someone PLEASE help me out.
Click to expand...
Click to collapse
I don't understand why you do your backups with CWM, and then you go into TWRP, what recovery do you have currently installed? You can only have one.
Erik
ricco333 said:
I don't understand why you do your backups with CWM, and then you go into TWRP, what recovery do you have currently installed? You can only have one.
Erik
Click to expand...
Click to collapse
I have never used twrp until this phone. I have been out of the loop for about 14 months... changed jobs and started my own company. been too busy. I followed instructions... and it talks about them BOTH being available for use.
The bottom line is I still dont see how the external SD card is not being seen... my backup and my roms are on the external... makes no sense. I can pull the card out and see the roms on my other lg optimus g pro just fine.
da9b16 said:
OK- I am not new here.... been away for awhile but. I recently rooted both of my lg optimus g pro e980 from ATT. I followed the directions on a few threads regarding this procedure. I installed twrp 2.6.3.0 and ran the updates that I could. I installed freegee pro as well. After I did this I also installed CWM recovery and made sure I updated it as well. I made a backup as I always have before I factory reset and I saved it to my external sd card.
I downloaded several roms to flash and gapps and a few other things i found that I liked and saved these to my ext sd card. I used astro file manager and root explorer to verify that the files were on the external sd card.
After the backup using cmw recovery I went into twrp. I did a factory reset per the instructions and after the reset I can't see my external SD card. I have tried EVERYTHING. I dug into every folder I could. I tried rebooting and seeing if I can see the external card from my pc. I cannot see it anywhere.
Can someone PLEASE help me out.
Click to expand...
Click to collapse
I have the same problem.
I used FReeGee to unlock my bootloader and flashed cwm to have my files visible. But still it messes up with my internal SD that it is always set to SDCARD/0. It is so useless and wastes more memories.
IS there something what we need to avoid or fix that issue with the SD`?
fosunite said:
I have the same problem.
I used FReeGee to unlock my bootloader and flashed cwm to have my files visible. But still it messes up with my internal SD that it is always set to SDCARD/0. It is so useless and wastes more memories.
IS there something what we need to avoid or fix that issue with the SD`?
Click to expand...
Click to collapse
Your problem is not related to CWM or FreeGee, the reason why you see SDcard/0 after you flash cm 10.2 or later is because with Jelly Bean 4.2 Android implemented the multi user feature that wasn't present in JB 4.1 that came with the G pro. That is easily solved, just do a search for Aroma File Manager and you can move your files from your SD to the folder /0 and recover your SD card lost space.
Erik
---------- Post added at 10:31 AM ---------- Previous post was at 10:27 AM ----------
da9b16 said:
I have never used twrp until this phone. I have been out of the loop for about 14 months... changed jobs and started my own company. been too busy. I followed instructions... and it talks about them BOTH being available for use.
The bottom line is I still dont see how the external SD card is not being seen... my backup and my roms are on the external... makes no sense. I can pull the card out and see the roms on my other lg optimus g pro just fine.
Click to expand...
Click to collapse
If I were you, I would flash the stock .tot file from att using LGflash tools and start over, when using FreeGee you don't have to install both recoveries, just choose one, I use CWM, there is only one recovery partition therefore only one recovery can be installed.
Erik
I can see this is dated, but maybe this is of some help. Twrp will not recognize any sd card if is exFAT. It has to be FAT32 if I'm not mistaken. It may just be FAT, but I'm pretty sure it's FAT32.
I have been having this issue, and did a good bit of research. I'm gonna reformat my memory card at some point to check, but it will take a while for me to get my files moved around.
Just thought I'd give you the heads up.
Sent from my LG-E980 using xda app-developers app
As far as TWRP goes, Madmack's Hacked TWRP is the only one that I've gotten to read my external sd. Both ExFAT and FAT32.
Sent from my Stock 4.4 LG-E980
Lg g pro at&t
I m also facing same problem , itried to instal recovery with various tools like rom mannager, flashifuy, freege etc...
but i was unable to instal recovery and at the end i found that i have lost my sd card excess. its not mounting now, neither i cud excess otg support. rest of the phone is working fine.
please help
momixp said:
I m also facing same problem , itried to instal recovery with various tools like rom mannager, flashifuy, freege etc...
but i was unable to instal recovery and at the end i found that i have lost my sd card excess. its not mounting now, neither i cud excess otg support. rest of the phone is working fine.
please help
Click to expand...
Click to collapse
i just ran into this problem and can't seem to find a solution! --- Did you ever get this resolved? If so would you please share!! Thank yoU!
Fat32 twrp
playerjunglejosh said:
I can see this is dated, but maybe this is of some help. Twrp will not recognize any sd card if is exFAT. It has to be FAT32 if I'm not mistaken. It may just be FAT, but I'm pretty sure it's FAT32.
I have been having this issue, and did a good bit of research. I'm gonna reformat my memory card at some point to check, but it will take a while for me to get my files moved around.
Just thought I'd give you the heads up.
Sent from my LG-E980 using xda app-developers app
Click to expand...
Click to collapse
This is a godsend. I was having issues with TWRP recognizing my SDCard and my Windows machine didn't have a problem. I formatted as a FAT32 and worked like a champ. I'm now able to backup my personal data before moving on the better ROMs... Thanks!

TWRP can't read SD card?

I've got an 8.4" Tab Pro; used Odin to root with CF Auto Root, and then install TWRP 2.7.0.0.
The SD installed is a 64gb Kingston MIcro SD XC which is formatted in FAT32...EXFAT should work in this version of TWPR, too, shouldn't it?
Once in TWRP, I did a factory wipe, then went to load my ROM, and TWRP showed nothing in the microSD directory (i.e. the "external_sd" directory was completely empty).
I haven't had any issues with the card in any other applications, including using it in my phone, my PC card reader, or the tablet.
Luckily, even after having done a factory wipe in TWRP, I rebooted, and the stock rom loaded, and I was able to save my zips to the local memory and load from there, but going forward, I'd like to understand why this limitation exists.
Any ideas?
Just for kicks, I reformatted in EXFAT, and no difference.
Try updating your TWRP version. I just recently flashed 2.8.0.1 on my new Tab Pro 8.4. I just checked and the SD card reads fine. My only issue has been that Windows Explorer doesn't see my TWRP backups sometimes. I haven't looked into it too much though.
batpot said:
Just for kicks, I reformatted in EXFAT, and no difference.
Click to expand...
Click to collapse
Haven't seen that issue with TWRP, but have learned that due to limitations in Samsung Kitkat ROMs Titanium Backup cannot write to the external sdCard without a modification to /system/etc/platform.xml. Could this apply to other applications also?
ShinakoX2 said:
Try updating your TWRP version. I just recently flashed 2.8.0.1 on my new Tab Pro 8.4. I just checked and the SD card reads fine.
Click to expand...
Click to collapse
Yep, that did it...the gui fits the whole screen now, too; cool.
No idea why I didn't download that version in the first place.

[Q] Updated to 5.0.1 and now experiencing SD card unmounting issues

Since Xposed and G3 Tweakbox are both available for Lollipop now, I decided to make the jump on my D850. However, I am experiencing issues with my SD card unmounting since updating to 5.0.1. For instance, restoring TiBu app backups frequently causes it to unmount and hang the restore process. It doesn't seem to have trouble doing stuff like playing music, but it will sometimes unmount randomly like when unlocking the device. Originally I thought it was a dying SD card since it is an older 64GB SanDisk, but a brand new 64GB Samsung card is exhibiting the same problem. I tried both cards formatted as FAT32 as well as exFAT. I also formatted them in Windows and via the phone itself to see if that made a difference.
If I revert to stock (using dll/tot/lgflashtool) I can use the SD card, including restoring backups, without issue (this is true of both cards, so I don't think there is actually a problem with the SanDisk card). If I install any 4.4.2 based ROM, I can still use the SD card without issue. As soon as I install 5.0.1, both SD cards start their unmounting dance. I figured perhaps something was getting corrupted when updating or maybe I was doing something wrong, so I tried a few methods of getting 5.0.1 on the device. I reverted to stock again and took the OTA, but I experienced the same unmounting issue. I also updated from stock using the ADB method as well as the TWRP flashable zip, but both cards still unmounted.
I went ahead and reverted to stock again, and I am running Wulf's 4.4.2 debloated ROM and the SD cards are both working normally. I restored 202 apps+data using TiBu without issue, and I haven't seen the card unmount once.
It doesn't seem to be a hardware issue with the phone or the cards, but I could be wrong and I am out of ideas. I don't really mind 4.4.2, especially since G3 Tweakbox works better, but there are a few 5.0.1 features that it would be nice to have.
Any thoughts on what the problem might be?
I am experiencing the same problem except I'm still on stock 4.4.2 My feeling is there is a software issue as well, I was considering the possibility that perhaps an app or the OS was writing some backup file to the card which corrupted it every so often.
Youre right though I only notice it after unlocking the phone so maybe there is a pattern here. Maybe its the unlocking that causes it to unmount. never had it unmount while in the middle of using the phone. Hope others discus this more people's experiences and thoughts will help us all figure out a solution.
ALSO: post up all specs for card and phone model. The SD Card is a Kingston Ultimate 64GB (Class 10 UHS-I) microSDXC Card, Up to 90MB/s read, 45MB/s write (SDCA10/64GB) phone is LG G3 D852 on Kitkat 4.4.2

CM13 exFat support

I just flashed the latest CM nightly for MM and when I put my SD card in the phone it says its corrupt. I do the reset with the phone to wipe it and after its done I only have 15MB instead of 64GB. Is there a manual fix for this or is it something I just have to wait for CM to do? I have the G3 D852 with latest TWRP.
OptimusOBrien said:
I just flashed the latest CM nightly for MM and when I put my SD card in the phone it says its corrupt. I do the reset with the phone to wipe it and after its done I only have 15MB instead of 64GB. Is there a manual fix for this or is it something I just have to wait for CM to do? I have the G3 D852 with latest TWRP.
Click to expand...
Click to collapse
It looks like you're going to have to wait for a long while to see exFAT get fixed, and yes, I am in the same boat as you are so I literally feel your pain, but that said, when the OS asks me to format the Samsung 64GB EVO microSD card, it gets formatted to FAT32, which is absolutely useless for large files that are more than 4GB, and I have a LOT of FAT32-UNFRIENDLY files that I need on my microSD card, so Android Marshmallow is officially off the cards for me until that problem is fixed.
I have the same problem.
When I format to swapable sd card, I end up in 16MB.
When I format it to internal storage, the formatting stucks at 20% and after a few minutes I get a toast message with "java.util.concurrent.timeoutexception blah blah" and I have to reformat the card on my computer.
Looks like moving on from 5.1 to 6 was one of my biggest mistakes since I have a smartphone.
//Edit
I see there is already a thread about this. Cheers!
http://forum.xda-developers.com/lg-g3/help/android-m-sd-card-formation-stuck-20-t3259186
Exact same boat as everyone here. 64gb card shows as 15mb. If I format it as internal storage, I get the timeout exception. Didn't even realize I was upgrading to cm13 when I hit the update through OTA. It's came in the same list as cm12.1 nightlies. Of course since I didn't realize I booted it up without flashing gapps for 6.0 and was stuck the entire day trying to wipe clean, flash and restore backups from titanium. Android wear doesn't function properly, BT pairings get deleted on every reboot, SD card is screwed, the list goes on. Such a silly way to include it through OTA update without any warning.
Good news folks!
For those users who have flashed finnq's CM13 nightlies (20151219 onwards), you can now use exFAT-formatted microSD cards - all you need to do is flash the Nebula Kernel:
http://forum.xda-developers.com/lg-g3/development/kernel-nebulakernel-rev6-5-build20150715-t3161768
All this because I wanted to free up space to install Grim Fandango...
I backed up my Samsung 64 gb card on my laptop and then reformatted my card as internal so I could use AppMgr III to move apps over. Now, I'm stuck with my SD card saying "checking...", and it doesn't recognize the card on my laptop.
Any ideas?
Fixes coming....
There are proposed changes currently sitting in code review at CyanogenMod. The changes have not yet been approved or merged. Here is a ROM image for LG G3 d850 that includes the proposed changes to fix the exFAT problem as well as the GPS problem. They work for me. YMMV. Use at your own risk!
cm-13.0-20160101-UNOFFICIAL-d850.zip

Micro SD Card says corrupted after installing Android Marshmallow in my LG G3 D858HK

Hi people. I had installed this ROM (Marshmallow 6.0) in my LG G3 D858HK dual sim. The link to the ROM is http://forum.xda-developers.com/lg-g3/development/lg-g3-d856-7-8-android-marshmallow-t3294053
But after installing the same my MicroSD card says its corrupted and asks to format it. I have formatted it several times and also by PC with a card reader. But still the issue persists. I don't get the option to set up my card as either INTERNAL or PORTABLE storage as it should be in Marshmallow ROMS. It directly starts to format as Portable storage and starts at 20% and shows successfully formatted. But still it shows that the card is corrupted. My card is working fine. I checked it. Please help.
I have the same problem and not yet identified the reason for this. Have you tried other ROMs? For me it is also happening on CM 13 and CandySix.
Answer.
Hope that helps, it worked for me with the same problem and works always....
link is:
https://www.youtube.com/watch?v=GeU0CxSWR5o
Cheers
I have the same issue with a Samsung 64GB microSD in a LG G3 d851 (T-Mobile USA). The card works fine in Windows and Android Lollipop. However I am testing several Marshmallow ROMs and so far I got this corrupted message in LightDark, Turbo and DU ROMs. However it works fine in Tesla-M. All of them are AOSP Android M ROMs. It seems that there is a problem somewhere but at least Tesla-M tells us that it can be fixed.
Fat32 lads, instead of exFAT format to fat32. The root in MM causes exFAT cards not to be read and stupidly the phone formats it to exFAT. Also the SIM contacts won't appear, instead you have to download an app to copy them from sim to phone.
I'm experiencing something similar.
I am on fulmics 4.2 on a d855. I had no problems for some weeks, than the phone started mounting and unmounting my sdcard, I tried all the suggestions I read online. Like slow formatting (tried all the types of partition), also I tried with the phone format. My best result was the read of the sdcard for just some hours, but then it started auto-expelling it.
I obviously tried with more sdcards and it's not a problem with them. Any suggestions? It's a software problem or an internal hardware problem?
I tried change the kernel a xceed and the sd card is recognized but not funcionally complete,(the radio fm do not work with xceed)
Enviado desde mi LG-D855 mediante Tapatalk
humtum0499 said:
Hi people. I had installed this ROM (Marshmallow 6.0) in my LG G3 D858HK dual sim.
The link to the ROM is http://forum.xda-developers.com/lg-g3/development/lg-g3-d856-7-8-android-marshmallow-t3294053
But after installing the same my MicroSD card says its corrupted and asks to format it. I have formatted it several times and also by PC with a card reader. But still the issue persists. I don't get the option to set up my card as either INTERNAL or PORTABLE storage as it should be in Marshmallow ROMS. It directly starts to format as Portable storage and starts at 20% and shows successfully formatted. But still it shows that the card is corrupted. My card is working fine. I checked it. Please help.
Click to expand...
Click to collapse
Hi all,
I found out that the same SD card I have since I bought the S5, May 2014, just got corrupted.
It won’t format in the phone, I use the AParted, ES File Explorer, FX Explorer and it never work.
I can still use it in a camera, PC, another Phone and it worked fine!
I put the card back in my PC, reformat in Fat32, ext4, NTFS and each time never worked in the S5.
I did the same thing with a bran new one too, same results.
It starts after updating SuperSU 2.61 to 2.71, in Marshmallow.
Few days’ work fine and then, corrupted.
I tried many options people have here and still the same result, corrupted.
I fix it (I hope) with doing a full factory reset in Marshmallow first.
Got to TWRP and did a full Wipe, Format Data and Adv. Wipe; select everything.
Yes, that clean a lot.
Use Odin and re-flash Marshmallow.
Everything is fine now, but it is only a few days that I did this, so it might still happen.
Could it be the version of SUperSU I took that has something? Or It is actually Marshmallow 6.0.1 with SuperSU ?
We might never know as the version change often.
Hope that will help someone.
VE2HRJ
VE2HRJ said:
Hi all,
I found out that the same SD card I have since I bought the S5, May 2014, just got corrupted.
It won’t format in the phone, I use the AParted, ES File Explorer, FX Explorer and it never work.
I can still use it in a camera, PC, another Phone and it worked fine!
I put the card back in my PC, reformat in Fat32, ext4, NTFS and each time never worked in the S5.
I did the same thing with a bran new one too, same results.
It starts after updating SuperSU 2.61 to 2.71, in Marshmallow.
Few days’ work fine and then, corrupted.
I tried many options people have here and still the same result, corrupted.
I fix it (I hope) with doing a full factory reset in Marshmallow first.
Got to TWRP and did a full Wipe, Format Data and Adv. Wipe; select everything.
Yes, that clean a lot.
Use Odin and re-flash Marshmallow.
Everything is fine now, but it is only a few days that I did this, so it might still happen.
Could it be the version of SUperSU I took that has something? Or It is actually Marshmallow 6.0.1 with SuperSU ?
We might never know as the version change often.
Hope that will help someone.
VE2HRJ
Click to expand...
Click to collapse
Hi all,
Here it is again, my SD card is corrupted again by the OS… but I can access the card by my PC or another phone!
So it seams to be a combination of OS 6.0.1 (Canadian Rogers), how it is rooted (Twrp) and the SuperSU free v2.76.
I’ll wipe the phone again and re-install the original Os from the carrier, no Root & no SuperSU.
I’ll wait for a week and see.
Keep you posted.
Have a great one!
VE2HRJ
Try this...
Hi All,
I rooted by phone this week also using the KingRoot method and also had the same issue. The below steps resolved it for myself and hopefully for you.
Since this is my first post I can't paste the URL to the site as the forum won't let me, so you'll have to google it, sorry about that.
Google - 32fat guiformat and look for the site 'GUI Format - Ridgecrop Consultants Ltd'
Download the program by clicking on the picture.
Run the program and select the drive letter of your memory card. Set the Allocation unit size to 32768 and untick Quick Format the press Start.
The format process takes maybe 45mins. But afterwards you'll have a full 64GB card formatted as FAT32 and will work in your phone again. Hope this helps you...
Enjoy your day.
JMP$EA31
If you can verify that more than one card works in a computer but not on the phone, and that formatting the card in the phone goes to 20 % very quickly, while afterwards going to 100 % but still tells you it´s corrupted, then indeed it´s simply the installation of Marshmellow that suddenly no longer wants to work with the file system of the card.
For me, the 32fat guiformat program told me that card was locked by another application, so I did it manually:
In windows elevated command prompt - after backing up eventual data on the card:
diskpart
list disk
(now find out which one is your sdcard, let´s call it x)
select disk x
clean
create partition primary
select partition 1
format fs=fat32
When the format is finished, if the cards size is beyond 32 GB, you´ll get a message about that the disk is too big.
At this point I managed though to make a quick format in the before mentioned FAT32 GUI Format program, and bingo - the card is recognized in the phone again.
No need for the diskpart stuff of course, if you already had success with the GUI thingy, just telling in case anyone experiences the same problems as me.
It may be that there´s a way to tell diskpart to use a different cluster size to avoid the error at the end, and also there may be a trick to make the card available to fat32gui. without first going through the diskpart step In my case though, I had the error on two different computers, on which none of them were accessing the card from any applications, disk management, win explorer etc.
Finally I´d like to add that this is not a general error for all Marshmallow phones: My huawei p8 worked fine with the card, also on Marshmallow, before I had to reformat it to fat32.
It´s a pretty sucky bug: Never mind the hassle of formatting the card, as long it works. What bothers me is the 4 GB limit of files in fat32. It´s easy to have a movie nowadays which is larger than that.
PS: Some people recommend using an app called aparted to format the card on the phone, which now has another name. I tried that, but it kept on closing itself, so perhaps it´s not compatible with Marshmallow or the same plus LG G3.
JMP$EA31 said:
Hi All,
I rooted by phone this week also using the KingRoot method and also had the same issue. The below steps resolved it for myself and hopefully for you.
Since this is my first post I can't paste the URL to the site as the forum won't let me, so you'll have to google it, sorry about that.
Google - 32fat guiformat and look for the site 'GUI Format - Ridgecrop Consultants Ltd'
Download the program by clicking on the picture.
Run the program and select the drive letter of your memory card. Set the Allocation unit size to 32768 and untick Quick Format the press Start.
The format process takes maybe 45mins. But afterwards you'll have a full 64GB card formatted as FAT32 and will work in your phone again. Hope this helps you...
Enjoy your day.
JMP$EA31
Click to expand...
Click to collapse
Thank you. It worked.
humtum0499 said:
Hi people. I had installed this ROM (Marshmallow 6.0) in my LG G3 D858HK dual sim. The link to the ROM is http://forum.xda-developers.com/lg-g3/development/lg-g3-d856-7-8-android-marshmallow-t3294053
But after installing the same my MicroSD card says its corrupted and asks to format it. I have formatted it several times and also by PC with a card reader. But still the issue persists. I don't get the option to set up my card as either INTERNAL or PORTABLE storage as it should be in Marshmallow ROMS. It directly starts to format as Portable storage and starts at 20% and shows successfully formatted. But still it shows that the card is corrupted. My card is working fine. I checked it. Please help.
Click to expand...
Click to collapse
same problem i tried everything aparted, wiping partition from twrp, cmd promt.
maybe busybox
I know this is an old thread but I've recently had this same situation but I found it was a result of installing busybox with Busybox Pro from Stericson. I used the "Smart Install" feature and selected to "Replace all symlinks" and "Clean Mode".
Basically, I believe by doing clean mode and replacing all symlinks, I had replaced needed System applets which somehow had hindered the OS from being able to correctly mount any External SD Card.
After using TWRP to factory reset (Wipe System, Data, Dalvik, Cache, Internal Storage) I Odin Flashed the latest stock firmware and then proceeded to root, etc. BTW, My phone is a T-Mobile Samsung Galaxy Note 4 SM-N910T on Net10 prepaid network.
Worked for me!!
JMP$EA31 said:
Hi All,
I rooted by phone this week also using the KingRoot method and also had the same issue. The below steps resolved it for myself and hopefully for you.
Since this is my first post I can't paste the URL to the site as the forum won't let me, so you'll have to google it, sorry about that.
Google - 32fat guiformat and look for the site 'GUI Format - Ridgecrop Consultants Ltd'
Download the program by clicking on the picture.
Run the program and select the drive letter of your memory card. Set the Allocation unit size to 32768 and untick Quick Format the press Start.
The format process takes maybe 45mins. But afterwards you'll have a full 64GB card formatted as FAT32 and will work in your phone again. Hope this helps you...
Enjoy your day.
JMP$EA31
Click to expand...
Click to collapse
Thanks so much for posting this! Solved my problem with no issue. :good:
VE2HRJ said:
Hi all,
Here it is again, my SD card is corrupted again by the OS… but I can access the card by my PC or another phone!
So it seams to be a combination of OS 6.0.1 (Canadian Rogers), how it is rooted (Twrp) and the SuperSU free v2.76.
I’ll wipe the phone again and re-install the original Os from the carrier, no Root & no SuperSU.
I’ll wait for a week and see.
Keep you posted.
Have a great one!
VE2HRJ
Click to expand...
Click to collapse
Did you ever find out a resolution to this? I'm having the same problem -- card works in computer and other devices, but not tablet which was rooted (twrp) with supersu installed. In fact, no sdcard will work now in that tablet, formatted using gui formatter mentioned earlier or not.
---------- Post added at 10:29 PM ---------- Previous post was at 10:24 PM ----------
VE2HRJ said:
Hi all,
Here it is again, my SD card is corrupted again by the OS… but I can access the card by my PC or another phone!
So it seams to be a combination of OS 6.0.1 (Canadian Rogers), how it is rooted (Twrp) and the SuperSU free v2.76.
I’ll wipe the phone again and re-install the original Os from the carrier, no Root & no SuperSU.
I’ll wait for a week and see.
Keep you posted.
Have a great one!
VE2HRJ
Click to expand...
Click to collapse
Zerokool1995 said:
I know this is an old thread but I've recently had this same situation but I found it was a result of installing busybox with Busybox Pro from Stericson. I used the "Smart Install" feature and selected to "Replace all symlinks" and "Clean Mode".
Basically, I believe by doing clean mode and replacing all symlinks, I had replaced needed System applets which somehow had hindered the OS from being able to correctly mount any External SD Card.
After using TWRP to factory reset (Wipe System, Data, Dalvik, Cache, Internal Storage) I Odin Flashed the latest stock firmware and then proceeded to root, etc. BTW, My phone is a T-Mobile Samsung Galaxy Note 4 SM-N910T on Net10 prepaid network.
Click to expand...
Click to collapse
Did this work?
kitelooper said:
Hope that helps, it worked for me with the same problem and works always....
link is:
https://www.youtube.com/watch?v=GeU0CxSWR5o
Cheers
Click to expand...
Click to collapse
Is there another link for this video? The one above no longer works.
Hey guys pls help me
After custom ROM installation of 7.1 my phone Gionee M2 shows sdcard corrupted and also my sim contacts disappeared!! Pls tell me how to fix it.

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