Develop Bugs

[Q] sd card unmount unexpectedly

Hye everybody..im having a small problem with my n2..my external sdcard sometime get unmount automatically after unlocking to home screen. .anyone having this problem? This can effect battery life since the media will be rescan each time it happen. .may I know the cause of the problem and if possible a way to solve it..tq
Sent from my GT-N7100 using Tapatalk 2

coincidentally, am experiencing the same thing recently
am pulling my hair off due to it lol

me to exp the same problem is it because of phone or the card?

Experienced it before... And I flashed a different kernel, it is solved.
Accidentally sent from my Samsung Galaxy Note 2

melvinchng said:
Experienced it before... And I flashed a different kernel, it is solved.
Accidentally sent from my Samsung Galaxy Note 2
Click to expand...
Click to collapse
Which kernel? Am relief to hear others are having the same problem..I guess it may relate to firmware or kernel since few people are having the same problem..
Sent from my GT-N7100 using Tapatalk 2

Yes, it's been happening to me too when unlocking the phone (and seemingly more recently over the last week).
Using a Sandisk Ultra card and on the standard 4.1.1 ROM.

Let me guess, you are all using sandisk ultra cards? These cards appear to be a real pain in the a s s . Mine, (bought new off Amazon in October) went tits up and I believe it was the card that somehow caused corrupted files and caused my "media" process to be a complete battery hog.
About a week before the card totally failed to be recognized by my computer or my phone, I got those random messages about my sd card being unmounted and then it would just automatically scan it as if I had just inserted it when in reality I never took it out. I was able to copy everything to my computer about an hour before it was complete toast
I suggest you copy any important files on the card to your computer or wherever before it completely fails. I don't know what to do about getting a new card. I already filed a warranty claim with Sandisk but I am hesitant to use their brand again. Sandisk seems to be THE brand out there. I would like to try another brand.

livingaboard said:
Let me guess, you are all using sandisk ultra cards? These cards appear to be a real pain in the a s s . Mine, (bought new off Amazon in October) went tits up and I believe it was the card that somehow caused corrupted files and caused my "media" process to be a complete battery hog.
About a week before the card totally failed to be recognized by my computer or my phone, I got those random messages about my sd card being unmounted and then it would just automatically scan it as if I had just inserted it when in reality I never took it out. I was able to copy everything to my computer about an hour before it was complete toast
I suggest you copy any important files on the card to your computer or wherever before it completely fails. I don't know what to do about getting a new card. I already filed a warranty claim with Sandisk but I am hesitant to use their brand again. Sandisk seems to be THE brand out there. I would like to try another brand.
Click to expand...
Click to collapse
Im using a sandisk ultra 32gb card ever since i got my sgn2 a few months bck, never even formatted it to anything else n flashed a s#itload of roms n kernels too never had or have a prob, btw currently using omega 8.0 n perseus alpha 29....
Sent from my GT-N7100 using xda premium

livingaboard said:
Let me guess, you are all using sandisk ultra cards? These cards appear to be a real pain in the a s s . Mine, (bought new off Amazon in October) went tits up and I believe it was the card that somehow caused corrupted files and caused my "media" process to be a complete battery hog.
About a week before the card totally failed to be recognized by my computer or my phone, I got those random messages about my sd card being unmounted and then it would just automatically scan it as if I had just inserted it when in reality I never took it out. I was able to copy everything to my computer about an hour before it was complete toast
I suggest you copy any important files on the card to your computer or wherever before it completely fails. I don't know what to do about getting a new card. I already filed a warranty claim with Sandisk but I am hesitant to use their brand again. Sandisk seems to be THE brand out there. I would like to try another brand.
Click to expand...
Click to collapse
Yes im using a sandisk ultra 32 gig class10..however my other friends also having the same problem but he is using kingmax..now im not sure weather the problem rise because of the sd or default in the phone itself..
Sent from my GT-N7100 using Tapatalk 2

livingaboard said:
Let me guess, you are all using sandisk ultra cards? These cards appear to be a real pain in the a s s . Mine, (bought new off Amazon in October) went tits up and I believe it was the card that somehow caused corrupted files and caused my "media" process to be a complete battery hog.
About a week before the card totally failed to be recognized by my computer or my phone, I got those random messages about my sd card being unmounted and then it would just automatically scan it as if I had just inserted it when in reality I never took it out. I was able to copy everything to my computer about an hour before it was complete toast
I suggest you copy any important files on the card to your computer or wherever before it completely fails. I don't know what to do about getting a new card. I already filed a warranty claim with Sandisk but I am hesitant to use their brand again. Sandisk seems to be THE brand out there. I would like to try another brand.
Click to expand...
Click to collapse
You explained well.... same sad story!!!

im using transcend 32 gb its work fine in my note but its not work properly in note 2

My views on this issue
I have started facing this issue since the past 3-4 days and here are my views that can also serve as valuable information for everyone else:
- This error message started to appear only after I upgraded to android 4.1.2 by flashing the stock rom via odin.
- Im also using the SanDisk Ultra Class 10 32GB card
- I have not rooted my phone after upgrade and my phone is in fully stock condition, although it was rooted before.
- I dropped my phone once. But it was a very minor drop and everything was fine after the drop as it was on 4.1.1 at that time and i was on the same for further 10-15 days and never witnessed the error during these days..
These things should also be considered-
- The method of copying data from PC to phone. I use data cable and copy to the folders while the card is in the phone.
- Whether you remove the card without unmounting it.
I have tried formatting the card from windows using fat32 setting. It didnt help.
Formatted it with the phone and still saw the error once in the past 24hours..
In future, if I encounter the same problem, I might get the card replaced by visiting the sandisk service center here in India. Or, I can try flashing 4.1.1 again and revert back the result. As of now, everything seems to be fine as I have not seen the error for about a day or so.. (Fingers crossed)

sagarb said:
im using transcend 32 gb its work fine in my note but its not work properly in note 2
Click to expand...
Click to collapse
Thats what makes me feel uncomfortable. .if the card is the problem I think my pc wouldn't recognize it or reading the data in it..however it is doing fine with the pc..
Sent from my GT-N7100 using Tapatalk 2

rascal123 said:
Thats what makes me feel uncomfortable. .if the card is the problem I think my pc wouldn't recognize it or reading the data in it..however it is doing fine with the pc..
Sent from my GT-N7100 using Tapatalk 2
Click to expand...
Click to collapse
and i read pple's card getting fried due to this issue

rascal123 said:
Thats what makes me feel uncomfortable. .if the card is the problem I think my pc wouldn't recognize it or reading the data in it..however it is doing fine with the pc..
Sent from my GT-N7100 using Tapatalk 2
Click to expand...
Click to collapse
my doubt is wheather phone is having problem or the card im confuse which service center should i go first samsung or transcend .another thing is today i flashed 4.1.2 india stock rom again through odin now card wont dectecting at all but it is good and recognize with note and my pc

Paul013 said:
I have started facing this issue since the past 3-4 days and here are my views that can also serve as valuable information for everyone else:
- This error message started to appear only after I upgraded to android 4.1.2 by flashing the stock rom via odin.
- Im also using the SanDisk Ultra Class 10 32GB card
- I have not rooted my phone after upgrade and my phone is in fully stock condition, although it was rooted before.
- I dropped my phone once. But it was a very minor drop and everything was fine after the drop as it was on 4.1.1 at that time and i was on the same for further 10-15 days and never witnessed the error during these days..
These things should also be considered-
- The method of copying data from PC to phone. I use data cable and copy to the folders while the card is in the phone.
- Whether you remove the card without unmounting it.
I have tried formatting the card from windows using fat32 setting. It didnt help.
Formatted it with the phone and still saw the error once in the past 24hours..
In future, if I encounter the same problem, I might get the card replaced by visiting the sandisk service center here in India. Or, I can try flashing 4.1.1 again and revert back the result. As of now, everything seems to be fine as I have not seen the error for about a day or so.. (Fingers crossed)
Click to expand...
Click to collapse
I have not rooted my phone after upgrade and my phone is in fully stock condition, although it was rooted before.
my card unmount problem started ever snice i came to stock from root

sagarb said:
I have not rooted my phone after upgrade and my phone is in fully stock condition, although it was rooted before.
my card unmount problem started ever snice i came to stock from root
Click to expand...
Click to collapse
Have u try other card than the one u currently use?
Sent from my GT-N7100 using Tapatalk 2

My sd card got broken today...nothing can read it anymore.. any idea on how to recover files from broken sd card?
Sent from my GT-N7100 using Tapatalk 2

I can confirm that the sd card is the causing of this problem..just replace to a new one n didn't facing any problem yet
Sent from my GT-N7100 using Tapatalk 2

Rooted my phone and install CWM I get this problem, but after format the sd card to fat32, everythings go well......

UPDATE (see post#30):SanDisk Ultra 32GB kiss of death? (

For the past 4-5 months, I've been seeing quite a few posts regarding issues with the SanDisk Ultra 32 GB microSDHC Class 10 UHS-1 Memory Card 30MB/s with Adapter SDSDQUA-032G-U46. I bought one back in November 2012... been running it hard for 6 months without incident.. so figured I was one of the lucky SanDisk recipients.... until today! Starting today, every time I wake the phone get the "sdcard mount" message. So loaded "SD Card Monitor" from the Market (screenshot attached) and found that during deep-sleep, it unmounts/mounts/removed/bad-removal/ejects constantly (example: phone slept from 10:04am to 10:22am)...but during wake state, no issues. So I suspect I'm about to experience the SanDisk 32GB Ultra kiss of death any day now. Backed up ExtSD to computer, but now the search for a proper extSD replacement. Any recommendations? Leaning towards Samsung 32GB or 64GB...
UPDATE: SEE POST # 30

Yea I just bought mine about a month and a half go. One month in of using it, my card corrupted and I ended up having to reset it. Lost everything! Lucky I put anything of importance on my cloud before it finally died on me. :banghead:
Sent from my SGH-I317 Jedi ROM

I would suggest going with the 64GB. I never had any problems.

daywalker04 said:
I would suggest going with the 64GB. I never had any problems.
Click to expand...
Click to collapse
64gb are the issue right now. If you want a reliable card than buy Samsungs sd cards
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2

Just got my replacement card today 64gb Sandisk. Bought it two months ago, card shows as raw format and can't access it at all.
Sent from my SGH-I317M using xda premium

Are you having issues with dropped calls too? I was thinking I was alone, and maybe it was a bad module? I got my phone 2nd hand, and that's my next step to order a new sdcard/sim card module and try to replace it. Data works fine and never cuts out, phone calls last maybe 30 seconds, and it's killed 2sdcards already. ..

johng75 said:
Are you having issues with dropped calls too? I was thinking I was alone, and maybe it was a bad module? I got my phone 2nd hand, and that's my next step to order a new sdcard/sim card module and try to replace it. Data works fine and never cuts out, phone calls last maybe 30 seconds, and it's killed 2sdcards already. ..
Click to expand...
Click to collapse
No problem with dropped calls... can still read/write to extSD fine, but now getting all the mount/unmount warning messages (and log confirms its poised for failure).

DoctorQMM said:
No problem with dropped calls... can still read/write to extSD fine, but now getting all the mount/unmount warning messages (and log confirms its poised for failure).
Click to expand...
Click to collapse
What did you use to format your card? Just curious cuz mine was formatted to fat32 before never had mount / unmount problem it just quit on me.
Sent from my SGH-I317M using xda premium

64gbyte Good ... Fire BAD ,,,
Andrew149 said:
64gb are the issue right now. If you want a reliable card than buy Samsungs sd cards
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
Click to expand...
Click to collapse
I've used this card since November 2012. Never an issue. And have used it extensively. I currently have 5 fully ripped DVDs on there now and exchange with new ones every so often. Can't beat it. Love the way Samsung/Android has allowed add on cards to be used seamlessly with apps.
SanDisk Ultra 64 GB MicroSDXC Class 10 UHS-1 Memory Card with Adapter (SDSDQU-064G-AFFP-A)
J

jon3sh said:
What did you use to format your card? Just curious cuz mine was formatted to fat32 before never had mount / unmount problem it just quit on me.
Sent from my SGH-I317M using xda premium
Click to expand...
Click to collapse
FAT32... not a single problem for 5 months until today... and I r/w the crap out of my extsd cards daily... we'll see what happens.. still works, just getting these warning messages.

Really like that Samsung SD card idea.
Back to Amazon. ...g

I purchased one of these from Amazon last week. Works like a charm, albeit only when formatted as FAT32.
It is roughly twice as fast doing read/writes than my previous Samsung 32GB card.

DoctorQMM said:
FAT32... not a single problem for 5 months until today... and I r/w the crap out of my extsd cards daily... we'll see what happens.. still works, just getting these warning messages.
Click to expand...
Click to collapse
Could be the format of fat32 causing it used my other card with exfat format and never give me problem or maybe just bad batch of cards we got.
Sent from my SGH-I317M

My Sandisk stoped working also, so I bought the samsung 32gb and it's starting to do the same thing again. I just think there is something wrong with samsung phones in general.

I haven't had any issues with my sd card or phone. But a buddy of mine has burned up 3 pny cards and one sandisk. Although it's an s3. Sounds like a phone issue. I told him to call a warranty claim.
Sent from my SGH-I317 using xda app-developers app

Cant recall ever losing a card to a defect...but then again, I dont use sandisk either....g

Same hear had the sandisk ultra 64gb for almost a year and no issues
Sent from my SAMSUNG-SGH-I317 using xda premium

jimstars said:
I've used this card since November 2012. Never an issue. And have used it extensively. I currently have 5 fully ripped DVDs on there now and exchange with new ones every so often. Can't beat it. Love the way Samsung/Android has allowed add on cards to be used seamlessly with apps.
SanDisk Ultra 64 GB MicroSDXC Class 10 UHS-1 Memory Card with Adapter (SDSDQU-064G-AFFP-A)
J
Click to expand...
Click to collapse
You could of had a good batch but theres been 100s of reports sandisk fail over and over again
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2

I just had mines ALMOST fail on me. Had unexepected removal notices for about a month. Started an RMA with Sandisk right before it started to go "Blank SD card".
Least they have 10 year warranties.

10 years ??
Wow....not bad....g

[Q] Bad 32gb micro? ...or did I F up?

Im not a stranger to rooting (thanks due to all the awesome devs here!) But sadly a ran low on storage. Bought a 32gb Sandisk class 10 ($24...Why pass on that?!) I copied current sd to computer, then transferred to new sd card. Well, phone was incredibly laggy. Ended up freezing. Pulled battery, rebooted.... froze on samsung screen (waited almost 10 mins) Pulled battery again. Attempted to reflash current rom, but upon reboot it sent me back to recovery with message of no OS. Not one of my roms would succeed. Back to old sd card.
Now i must ask, did i miss something here? Or is it a defective card? Im a sucker for punishment. I formatted card, only putting rom files on to use. Still failed on me.
Returned to original sd card, reflashed rom. Back to normal!!

There is a known issue with SanDisk SD Cards, and the Samsung Galaxy S3. You can find more info HERE. I believe the the issue has since been resolved. You can try to format the SD Card with SD Formatter. It may save the SD Card. But either way you can follow the link I gave you. There is another link there to the SanDisk site. They should replace your card. Or you can take it to your local retailer with a copy of the link page. They should take care of the issue.

What is the best sd card to buy?
Sent from my SPH-L710 using xda app-developers app

That's seems to be a matter of opinion. I still have a SanDisk Ultra SDHC 32GB Class 10 micro SD Card. I had to exchange it once. But after I received the new SD Card, I've had ZERO issues with it.

prboy1969 said:
That's seems to be a matter of opinion. I still have a SanDisk Ultra SDHC 32GB Class 10 micro SD Card. I had to exchange it once. But after I received the new SD Card, I've had ZERO issues with it.
Click to expand...
Click to collapse
I have my 32GB sitting on a shelf.
I have no proof of purchase, but I did purchase it.
Am I boned?
Sent from my SPH-I710 using xda premium

xblackvalorx said:
I have my 32GB sitting on a shelf.
I have no proof of purchase, but I did purchase it.
Am I boned?
Sent from my SPH-I710 using xda premium
Click to expand...
Click to collapse
I would try contacting SanDisk directly. They may replace it.

xblackvalorx said:
I have my 32GB sitting on a shelf.
I have no proof of purchase, but I did purchase it.
Am I boned?
Sent from my SPH-I710 using xda premium
Click to expand...
Click to collapse
I got mine as a gift and mine went out recently...emailed sandisk a few times back and forth (they ask where it is from, never gave them a receipt or anything) and they replaced it for free...just got it today!
Sent from my SPH-L710 using Tapatalk 4 Beta

prboy1969 said:
That's seems to be a matter of opinion. I still have a SanDisk Ultra SDHC 32GB Class 10 micro SD Card. I had to exchange it once. But after I received the new SD Card, I've had ZERO issues with it.
Click to expand...
Click to collapse
Same here. Since replacement haven't had a single issue. When I contacted Sandisk never required reciept.

SD card not mounting

here's a real puzzler. Today I noticed that my SD card wasn't mounting anymore. I'm rooted on stock ROM. Everything else seems to be working. It won't mount. I've tried using root Explorer and TWRP. Nothing. Thoughts? Anyone?! TWRP sees the card while I'm in recovery. Once I reboot into stock ROM, I lose it. I try to mount it, then I'm getting a 'safe to remove card' notification.
Sent from my SGH-M919 using xda premium

jerzyboy2421 said:
here's a real puzzler. Today I noticed that my SD card wasn't mounting anymore. I'm rooted on stock ROM. Everything else seems to be working. It won't mount. I've tried using root Explorer and TWRP. Nothing. Thoughts? Anyone?! TWRP sees the card while I'm in recovery. Once I reboot into stock ROM, I lose it. I try to mount it, then I'm getting a 'safe to remove card' notification.
Sent from my SGH-M919 using xda premium
Click to expand...
Click to collapse
Stupid question, but have you tried physically re-seating the card? I had odd issues like that on my S2.
Other thought, can you mount the card using a PC?

I've tried reseating the card multiple times with no luck. TWRP will see the card while in recovery. But when I boot into the OS, I lose it. I'm stumped.
Sent from my SGH-M919 using xda premium

One random thought, and probably isn't your solution ... Is the card formatted with exFAT or ntfs. Gs4 won't natively support ntfs formatted cards. Plug it into ur pc and check the properties... Worth a shot
Sent from my SGH-M919 using Tapatalk 2

Go into manage apps under settings and clear data for media storage.
Sent from my SGH-M919 using Tapatalk 2

elesbb said:
Go into manage apps under settings and clear data for media storage.
Sent from my SGH-M919 using Tapatalk 2
Click to expand...
Click to collapse
If this was the problem would it cause all sd cards to unmount? Or could it just effect 1?
I have a 32gb card that unmounts and remounts randomly. My 16gb card doesn't seem to have the problem.
Im not sure if the 32gb card is faulty or if it has a correctable error. So far formatting it does not help.
The difference between me and the op is that my card will mount, it will just unmount itself at a random later time.
Sent from your phone. You should be careful where you leave that thing.

Skipjacks said:
If this was the problem would it cause all sd cards to unmount? Or could it just effect 1?
I have a 32gb card that unmounts and remounts randomly. My 16gb card doesn't seem to have the problem.
Im not sure if the 32gb card is faulty or if it has a correctable error. So far formatting it does not help.
The difference between me and the op is that my card will mount, it will just unmount itself at a random later time.
Sent from your phone. You should be careful where you leave that thing.
Click to expand...
Click to collapse
Hmmm.very interesting. Maybe a faulty card?
Sent from my SGH-M919 using Tapatalk 2

elesbb said:
Hmmm.very interesting. Maybe a faulty card?
Sent from my SGH-M919 using Tapatalk 2
Click to expand...
Click to collapse
That is what Im leaning towards too. Just trying to confirm it
Sent from my SGH-M919 using xda app-developers app

Have you by any chance flashed a different kernel? I believe ExFAT file system is closed source and is not supported by most custom kernels, even if you're still running the stock ROM. If not, can you think of anything that you've changed between the last time you remember your card mounting and now?

Same here, plus viewing media on the card in the gallery seemed really laggy. I switched to a 16gb and have had no lag or issues with the card being mounted. The cards I got are both SanDisk Ultra cards
Skipjacks said:
I have a 32gb card that unmounts and remounts randomly. My 16gb card doesn't seem to have the problem.
Click to expand...
Click to collapse

DeadPlasmaCell said:
Same here, plus viewing media on the card in the gallery seemed really laggy. I switched to a 16gb and have had no lag or issues with the card being mounted. The cards I got are both SanDisk Ultra cards
Click to expand...
Click to collapse
That is exactly the card i had a problem with. The sandisk 32gb ultra.
That narrows down the issue, doesn't it?!
Sent from my SGH-M919 using xda app-developers app

I just RMA'd a 64gb ultra for the same issue. I started researching....seems to be an issue with the latest Sandisk ultra. I pretty much went through the gauntlet trying to fix it.... Back to stock. Back to exFat, formatted with PC, Mac back to fat, either AOKP, or touchwiz. Same issue. At first it was fine. Then slowly started dismounting and remounting. Then refused to mount...worked around the issue by formatting in exFat, mounting in TWRP.and reformatting... This seemed to fix it for about an hour, I started downloading my music from Spotify...again with dismounting... Drove me crazy...ordered Samsung 64gb
Sent from my SGH-M919 using Tapatalk 4 Beta

[email protected] said:
I just RMA'd a 64gb ultra for the same issue. I started researching....seems to be an issue with the latest Sandisk ultra. I pretty much went through the gauntlet trying to fix it.... Back to stock. Back to exFat, formatted with PC, Mac back to fat, either AOKP, or touchwiz. Same issue. At first it was fine. Then slowly started dismounting and remounting. Then refused to mount...worked around the issue by formatting in exFat, mounting in TWRP.and reformatting... This seemed to fix it for about an hour, I started downloading my music from Spotify...again with dismounting... Drove me crazy...ordered Samsung 64gb
Sent from my SGH-M919 using Tapatalk 4 Beta
Click to expand...
Click to collapse
I wonder what is different about those ultras.
Fun note...i put my San disk ultra back into my HTC sensation and it works fine like it has for 6 months. Then i put it in my samsung tablet and it fails there too. And in my samsung phone it fails.
Now i have a 16gb san disk regular card in the phone and it works fine.
Sent from my SGH-M919 using xda app-developers app

i got a sandisk 64 GB about 8 months ago. no issues

OK, so I have more information. I flashed back to stock last night. The card miraculously worked. I was able to format, and store data on it, and read from it. Then I rooted via twrp, flashed Super and the pre-May 7th kernel. Surprise surprise, after a reboot, the SD card is back to not mounting. Anyone have any suggestions?
Sent from my SGH-M919 using xda premium

possible solution?
crawler9 said:
Have you by any chance flashed a different kernel? I believe ExFAT file system is closed source and is not supported by most custom kernels, even if you're still running the stock ROM. If not, can you think of anything that you've changed between the last time you remember your card mounting and now?
Click to expand...
Click to collapse
hey folks, check this out:
http://forum.xda-developers.com/showthread.php?t=2271976

jerzyboy2421 said:
OK, so I have more information. I flashed back to stock last night. The card miraculously worked. I was able to format, and store data on it, and read from it. Then I rooted via twrp, flashed Super and the pre-May 7th kernel. Surprise surprise, after a reboot, the SD card is back to not mounting. Anyone have any suggestions?
Sent from my SGH-M919 using xda premium
Click to expand...
Click to collapse
Same exact thing happened to me with my San disk ultra card. Worked on stock, not on cm.
Was yours the San disk ultra too?
Sent from your phone. You should be careful where you leave that thing.

Yes, as a matter of fact. Look up at the link I posted above. Turns out it has to do with rooting and needing to flash a SetUID kernel prior to flashing Super SU. Something in there about exFAT not working. Flashed the exFAT fix and I'm up and running! :thumbup:
Sent from my SGH-M919 using xda premium

My phone is completely stock and unrooted. It's an SGH-M919. I've had it for less than a week.
I too am having an issue with the SD card. I bought a brand new 32gb PNY card, class 10. At first it mounted fine and there was no problem. I transferred files to it from my old 16gb card that was in my Sensation for 2 years.
The following morning, after the phone slept and charged for the night, the card unmounted itself. There was an error message in the notification bar. I tried repeatedly to remount the card to no avail. I reinserted it a dozen times, rebooted the phone several times with pulling the battery, but the card wouldn't mount. I then tried the card in my wife's brand new S4 (we got both phones the same day) and the card didn't work in her phone either.
I then plugged the card into my laptop and it mounted just fine, and all data was still on it. I tried it in the phone again, but it didn't mount yet again. I even reformatted the card in my laptop, but it still didn't work in either of our 2 S4's.
I went back to Frys and exchanged the card for another PNY 32gb card. It mounted in the phone just fine, and again I transferred files to it. This morning, again after a night of charging the phone, the new card was unmounted with the same error message. However, when I woke the phone up, after a few minutes the card remounted itself without having to take it out and reinsert it.
So far it's been about 7 hours and the card has stayed mounted with no issues. We'll see what happens overnight again, when the phone is charging and sleeping.
On the other hand, my old 16gb card has stayed mounted in my wife's S4 with no problems for several days now.

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...
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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?
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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
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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.
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Did you reformat as internal memory or just a standard format?
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---------- 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.
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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.
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I did it as external.