Develop Bugs

[Q] 64GB SD card unformattable in AOSP & AOKP

I have had my GS3 for a little over a month, rooted and had no issues, I installed another rom with no issue. Unfortunately when I tried to install a CM10 or AOKP rom, each say my ext sd card is damaged and needs to be formatted. I try to format, but it hangs and then just quits without completing the task.
I have tried formatting to fat32 on my PC, downloaded EaseUS Disk utility to format, but none seem to work. When I restore back into the previous rom, it still says damaged and then I can format and start over only in that non AOSP/AOKP rom.
I boot into recovery when the AOSP/AOKP roms are loaded and it wont even mount or format in recovery either.
Any ideas?

stretch0r said:
I have had my GS3 for a little over a month, rooted and had no issues, I installed another rom with no issue. Unfortunately when I tried to install a CM10 or AOKP rom, each say my ext sd card is damaged and needs to be formatted. I try to format, but it hangs and then just quits without completing the task.
I have tried formatting to fat32 on my PC, downloaded EaseUS Disk utility to format, but none seem to work. When I restore back into the previous rom, it still says damaged and then I can format and start over only in that non AOSP/AOKP rom.
I boot into recovery when the AOSP/AOKP roms are loaded and it wont even mount or format in recovery either.
Any ideas?
Click to expand...
Click to collapse
I think I read somewhere that in CM10/AOKP that it won't read/understand exFat very well.
So, formatting to Fat32 is definitely the way to go.
When I used some other programs it would say the same thing... that my card was damaged and had to be fixed.
I had a heck of a time finding a program that would do it for me on my 64gb sdxc SanDisk card!
But I found a free one called GUI Fat 32 Format that actually worked.
Click this link and it will start to download:
http://www.ridgecrop.demon.co.uk/guiformat.exe
It didn't work immediately, for me at first, but after a few tries it actually worked very well.
I think that once you get it into Fat32 all of your problems will go away. Hope so anyway.:cyclops:
Let us know if it works!

This seems to have corrected the issue, finally

stretch0r said:
This seems to have corrected the issue, finally
Click to expand...
Click to collapse
Glad it worked for you!
Sent from my SPH-L710 using xda app-developers app

I had a similar issue... I flashed an AOSP ROM on my phone n it corrupted my sd card and wouldn't format. before formatting I went back to a touchwiz ROM and it still said it was a bad sd card and needed to format I ended up formatting my card in my phone and lost all my data. I put music on my sd card and removed the sd card from my phone before flashing another AOSP ROM. After I installed another AOSP ROM I re-inserted the sd card and it again said it was bad and needed to be reformatted...
So my question is...How can you use a 64gb sd card on an AOSP ROM...I'm back on touchwiz for now. Sd card works fine.
Does formatting the sd card in your phone format it to exfat and not fat32?
Sent from my SPH-L710 using xda app-developers app

iomega311 said:
I think I read somewhere that in CM10/AOKP that it won't read/understand exFat very well.
So, formatting to Fat32 is definitely the way to go.
When I used some other programs it would say the same thing... that my card was damaged and had to be fixed.
I had a heck of a time finding a program that would do it for me on my 64gb sdxc SanDisk card!
But I found a free one called GUI Fat 32 Format that actually worked.
Click this link and it will start to download:
http://www.ridgecrop.demon.co.uk/guiformat.exe
It didn't work immediately, for me at first, but after a few tries it actually worked very well.
I think that once you get it into Fat32 all of your problems will go away. Hope so anyway.:cyclops:
Let us know if it works!
Click to expand...
Click to collapse
Wait, so you're saying that AOKP/CM10 don't have the necessary drivers to handle exFAT formatted sd cards?
Do you remember where/how you came upon this information? Was this issue particular to 64gb SDXC cards vs smaller SDHC cards or maybe to certain classes of cards?
I find this shocking, but I can't say it isn't unfounded.
I have a 64gb uhs-1 sandisk card coming from newegg in a few days, so I'm obviously concerned.
Any insight you could provide is greatly appreciated!

Hey guys... after doing some fooling around I've found out some (useful) information for people with 64 gb sd cards...
1. When you format an sd card while its inside your phone it will format it to exFat.... which is fine if you plan on only staying on TW ROMs. This format is not compatible with TWRP Recovery and has given me issues (causing me to loose all my data on my card) just by flashing an AOSP ROM
2. If you use the program posted in the second post(thanks iomega311) you can format your sd card to Fat32 and it will now work on TW ROMs, TWRP, and AOSP ROMs.
Hope this helps for anyone with SD Card Questions/issues.

In my opinion... Never program sd cards on phone... Always use a computer. Especially if you want it done right!!!!

kdepro said:
Wait, so you're saying that AOKP/CM10 don't have the necessary drivers to handle exFAT formatted sd cards?
Do you remember where/how you came upon this information? Was this issue particular to 64gb SDXC cards vs smaller SDHC cards or maybe to certain classes of cards?
I find this shocking, but I can't say it isn't unfounded.
I have a 64gb uhs-1 sandisk card coming from newegg in a few days, so I'm obviously concerned.
Any insight you could provide is greatly appreciated!
Click to expand...
Click to collapse
CM 10 which all the AOSP roms are based off does not support exFAT since it is a proprietary format and they don't want any legal trouble. The best way to format a 64GB gard is with GUI formatter

What allocation size did you guys use? Just got my 64GB SDXC and need to format it so that I can use it on CM10.

SD card problems stemming from CM10?

Ok. Here is the scenario. Was on stock rooted LCJ. SD card working perfectly there. I flash to MIUI after doing a totally clean wipe and I'm able to access the SD card via the rom and PC when I sync. I go into recovery and do a full wipe and then flash CM10 with gapps. CM10 loads up okay but i notice that i have a notification that the SD card is broken and I should try formatting it. I attempt to sync the phone to the pc via USB cable but only the internal storage will mount.
I go into recovery and confirm that TWRP can still see the contents of the SD card. Having confirmed that TWRP can see the SD card I do another full wipe and then restore my stock rooted LJC. However, after restoring LJC the SD card issue persist. The phone does an error check but it doesn't fix the issue. It recommends that I format the SD card which I don't want to do and don't know if it will work. I attempt to sync the phone to the PC with the USB cable (which has always worked) but only internal will mount. Go into recovery and the SD card's contents are still showing up.
Also, I have a Kingston Media reader which I pop the SD card into and connect to the PC. Even using this media reader the SD card is still not being seen and the PC says the card should be formatted. Basically the only damn thing that recognizes stuff on the SD card is TWRP.
Anyone have any good advice on this topic? BTW...I have a class 10 64GB sd card. As mentioned above I never ever had a problem with this thing. Have always mounted it to the PC w/o a problem and has always appeared on every rom I have ever tried until trying CM10 today.

41 views and not one person has any input? guess i'm going to have to format the card and hope that works. really sucks balls. wish i at least knew for sure what caused this problem.

had the exact same issue. I had just purchased a sandisk 64 gig the week before and when it happened I had a hard time believing it was the card that went bad. I had no luck recovering anything off of the card but did format it and it has worked fine since.

JAREDR said:
had the exact same issue. I had just purchased a sandisk 64 gig the week before and when it happened I had a hard time believing it was the card that went bad. I had no luck recovering anything off of the card but did format it and it has worked fine since.
Click to expand...
Click to collapse
its not the card...............its the formatting of the card. it has to be formatted fat32 for it to be recognized in cm10. stock format is exFAT

I had the same issue with my SanDisk 64 GB drive. I went back to Synergy and the card is recognized in that ROM. I can't get CWM or TWRP to recognize the card though. I get an error whenever I try to access the card from recovery. It sucks that I have to put anything I want to flash on internal memory

CWM + My EXT SD CARD = No Fun

Well I have a new version of CWM Mod, and apparently when you format the sd-card, it no longer formats the inner sd card but your external sd card. I was really pissed as I lost all my data I had saved, but it also managed to screw up my sd card. Neither of my computers recognize my SD Card and I have no idea how I can go about restoring it. My phone can detect the sd card but it will say its corrupt randomly. So I'm guessing CWM formatted the card in a really screwed up way. Any suggestions brahs?
I'll even try to mount the sd card on CWM but it wont be able to mount it. It's a shame to waste a 32 gig sd card like this

Have you tried to format through the phone storage? Menu/settings/storage/format
Sent from my SGH-T999 using Tapatalk 2

mrbmg said:
Have you tried to format through the phone storage? Menu/settings/storage/format
Sent from my SGH-T999 using Tapatalk 2
Click to expand...
Click to collapse
Only gives me the option to mount or unmount the SD card

How old is the SD card? This phone is know for eating up the 32 GB cards. I had one for less than 3 weeks and it did the same. I use trwp but there is a thread about cards and our misfortunes with the 32 GB.
Sent from my SGH-T999 using Tapatalk 2

Make sure you card is not in exfat. CWM will not read cards in exfat, I had the same problem. If it is you are going to need to format it to fat 32. Most 32gigs sd cards and higher come in exfat now. You are most likey going to have to do it on the computer also it cant be done from CWM.
Mateoftw said:
Well I have a new version of CWM Mod, and apparently when you format the sd-card, it no longer formats the inner sd card but your external sd card. I was really pissed as I lost all my data I had saved, but it also managed to screw up my sd card. Neither of my computers recognize my SD Card and I have no idea how I can go about restoring it. My phone can detect the sd card but it will say its corrupt randomly. So I'm guessing CWM formatted the card in a really screwed up way. Any suggestions brahs?
I'll even try to mount the sd card on CWM but it wont be able to mount it. It's a shame to waste a 32 gig sd card like this
Click to expand...
Click to collapse

Aoe316 said:
Make sure you card is not in exfat. CWM will not read cards in exfat, I had the same problem. If it is you are going to need to format it to fat 32. Most 32gigs sd cards and higher come in exfat now. You are most likey going to have to do it on the computer also it cant be done from CWM.
Click to expand...
Click to collapse
Yes but my computer won't even detect the SD Card. It was fine and dandy up until yesterday when I hit format on CWM on the SD Card thinking I was formatting the internal storage (since it's labelled /sdcard) but it formatted the actual SD. Windows won't detect my Micro SD and neither will my Mac. However if I put the SD card into my phone and connect via USB, it shows up.

Mateoftw said:
Yes but my computer won't even detect the SD Card. It was fine and dandy up until yesterday when I hit format on CWM on the SD Card thinking I was formatting the internal storage (since it's labelled /sdcard) but it formatted the actual SD. Windows won't detect my Micro SD and neither will my Mac. However if I put the SD card into my phone and connect via USB, it shows up.
Click to expand...
Click to collapse
You pressed format /sdcard, and it formatted your extsd? That's a pretty serious bug, so thanks for the heads up. What version of CWM are you running?

Op. I did the same thing a long time ago. I have gotten into the habbit of removing the sd card when I am formatting with a custom recovery. I also back up the sd to my pc and reformat the sd when changing roms. A bit off topic but I also wipe system before flashing a new rom. So far I have avoided many of the issues mentioned day after day. Maybe I am lucky but my wierd habits have been successful so far.

jcbofkc said:
Op. I did the same thing a long time ago. I have gotten into the habbit of removing the sd card when I am formatting with a custom recovery. I also back up the sd to my pc and reformat the sd when changing roms. A bit off topic but I also wipe system before flashing a new rom. So far I have avoided many of the issues mentioned day after day. Maybe I am lucky but my wierd habits have been successful so far.
Click to expand...
Click to collapse
Did you manage to fix the problem though? Not to be rude but I'm looking for solutions towards this specific situation, not advice on what to do next time :crying: :crying: :crying: :crying:

Aerowinder said:
You pressed format /sdcard, and it formatted your extsd? That's a pretty serious bug, so thanks for the heads up. What version of CWM are you running?
Click to expand...
Click to collapse
5.8 something. It's weird because it allows for both internal and external SD use. When you backup the first open is to save to external then its internal. First version of CWM i've ever used with such an option.

For anyone wondering about a solution, I used an android 2.3 device which actually has a format option for the SD card and now my computers recognize it again. Life is good
Sent from my SGH-T999 using xda app-developers app

SD card damaged after install pacman rom

Ive installed pacman rom on my note 2 but the sd status appeared as damaged and required a format .
I didn't format and went to recovery and restored the stock rooted rom 4.1.2 that I have backed up and it backed up successfully.
But the sd card appeard as damaged also in the stick rom .
I have backed up the backup files that were in the card , I can add photos and videos later .
Is there a way to fix the card without formating it?
Sent from my GT-N7100 using xda premium

Try a card reader.
Sent from my GT-N7100

Connected it to pc and it asked for formating the card .
Sent from my GT-N7100 using xda premium

I believe your sd card is 64gb and formatted in exFAT.
Pacman ROM is based on AOSP/CM (CMIIMW) therefore exFAT is not supported. Try to reformat you sdcard in FAT32 format (you will loss capability to store >4gb file in your sdcard) but it works.

same problem
I had just the same situation with Paranoid Android and 64Gb exFAT formatted card several days ago. I knew that PA (like any AOSP ROM) can't see exFAT filesystem. But I only wanted to test PA for a few days so I decided not to format card or remove it from the phone. I did nothing with the card in the PA ROM. Nevertheless I found my card damaged after returning to stock 4.1.2 ROM (just like ahmedss79 did). Neither Android nor windows could read my card.
But AROMA Filemanager saw the card and could read and write it. I used PhilZ Touch CWM with Aroma Filemanager and copied all important files from sd card to internal storage.
And when I opened my "damaged" sd card in partition manager (in Windows, using a card reader) I noticed that it has two partitions: small 12Mb FAT before big 59 Gb unknown partition. I guess this FAT partition was automatically created by PA after its fist boot and exactly this FAT partition made the card damaged as it wiped all file tables, located in the first couple of Mb of the original exFAT partition.

Is there any way to format to FAT32 using any application on an Android device?
I'm running PACMan at the moment, which seems to have the most features.
I have no hardware that can read my SD card on a PC at the moment.
I'm currently at work and don't feel like waiting 8 hours to do it at home, plus, there some compatibility issues formatting FAT32 on Windows 8

Reformat a 64gb micro SD Card

Something I've been meaning to ask, simply because it's a wierd occurrence. A few days ago, I got a new 64gb Samsung micro SD card. Naturally, I had to format it into FAT32. I went to format the card using my S III (because it has helped put both my 32gb cards into FAT32). Format successful, and I moved a bunch of backup files from my other card onto it, and hooked it up to my Galaxy Nexus using my Meenova reader. The storage mounted, but it couldn't be accessed. The format of the SD card, I found out, was exFAT, not FAT32. My question is this: why when you use the device to format it does the 64gb card get put to exFAT instead of FAT32? I had to use my laptop to format it I to FAT32, just like the last time I got a 64gb card.
Sent from my SPH-L710 using Tapatalk

I've always had to use my pc, I think the phone is only set up to format it in exfat because you can transfer larger files than fat32. I may be wrong though.