Develop Bugs

[Error] Sdcard unexpectedly removed

This has been the second time getting this error on SG3.
The first time I checked if the card was corrupted by putting the sdcard in the netbook, it was recognized and displayed all the folders. Inserted the card again in the SG3 and it wasn't recognized, rebooted into recovery and fixed permisions and cleared cache/dalvik and rebooted. The card was back up and everything was ok.
Again happened today, tried the same thing and nada Now it also says "Sdcard blank or unregonized file system" in notification and it then prompts for format confirmation upon tapping it.
I've googled and oogled and keep finding different solutions, some I cannot try now since I'm at work. One of them suggest to move all files to PC and format the card, I'll give that a shot at home and see. Another was to update the firmware, but on the latest L13... Apparently, this has been ongoing for sometime and there is an open issue in google for this.
http://code.google.com/p/android/issues/detail?id=19722
http://code.google.com/p/android/issues/detail?id=9736 - Originally opened for LG Ally, but HTC and Samsung users have also reported it on the same issue.
Anyone else encountered this problem in SG3?

Happens to me all the time. Sometimes it will just continue to prepare then unexpectedly removed pops up, then that will cycle and kill my battery. I just got a new SD card hoping that would fix it but it did not.
Sent from my SPH-L710 using xda app-developers app

alaman68 said:
Happens to me all the time. Sometimes it will just continue to prepare then unexpectedly removed pops up, then that will cycle and kill my battery. I just got a new SD card hoping that would fix it but it did not.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
I'm researching like a mad man! Found a few tools but most are for HDD and not microsd... found the one below that is supposed to detect the card/drive even if it's not mounted or has a drive letter and revover the file system, repair partitions, recover ALL file types, etc but nada
Had a few important fotos, my most recent nanroid, my TB folder, that last one hurt the most.
I didn't back up after the first "fix" cause I thought it was a one time things, never heard of this error before. Lesson learned
http://www.cgsecurity.org/wiki/PhotoRec

If your computer can see it and you don't mind losing data do a low level format on the SDcard
Edit: my SDcard started liked yours but got so bad i couldn't use it at all with my phone, I'm fact Windows couldn't even see it i had to use Linux.
Sent from my SPH-L710 using xda app-developers app

jamcar said:
If your computer can see it and you don't mind losing data do a low level format on the SDcard
Edit: my SDcard started liked yours but got so bad i couldn't use it at all with my phone, I'm fact Windows couldn't even see it i had to use Linux.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
Mine is in that state right now, XP won't pick it up, booting up Win7 PC to try it. My Nikin S70 detects it but it says unusable and won't format it either.
Guess my only option is to partition the netbooks HD and install Ubuntu on it, this gave a good excuse to try it out lol
Found this post that gives some pointers and explains the linux part.
http://forum.xda-developers.com/showpost.php?p=4112485&postcount=9

ugggg...... my sd was just totally killed. Windows will not even recognize it now and it reads as a blank SD in the phone. did you figure anything out OP? Mine is 32G sandisk class 10.
this sucks

Same thing happened with me D: did anyone find a solution other than losing all the data on it?
And since I see this thread is fairly new, did everyone else happen to be on the leaked Jelly bean build? It happened to me after the phone rebooted while on the leaked ROM
Sent from my SPH-L710 using Tapatalk 2

alaman68 said:
ugggg...... my sd was just totally killed. Windows will not even recognize it now and it reads as a blank SD in the phone. did you figure anything out OP? Mine is 32G sandisk class 10.
this sucks
Click to expand...
Click to collapse
Apart from the info already here, nope... I need to buy an external sd reader that gets a drive letter assigned without the card and try to force mount on win and run chkdsk, it's the only thing missing. Not even Linux picks it up! Not even force mount! This sucks and seems to have been a problem in android for some time now...
I did order a sandisk 32GB Ultra, but would like to fix this one. Might use it for the camera or give it to my better half for their TF700.
Sent from my SPH-L710 using xda app-developers app

Next time it happens and your pc still happens to pick it up, run a chkdsk on it. Do not format it. It might prevent it from happening again...
Sent from my SPH-L710 using xda app-developers app

imaconeheadXD said:
Same thing happened with me D: did anyone find a solution other than losing all the data on it?
And since I see this thread is fairly new, did everyone else happen to be on the leaked Jelly bean build? It happened to me after the phone rebooted while on the leaked ROM
Sent from my SPH-L710 using Tapatalk 2
Click to expand...
Click to collapse
i was not on the JB leak. Beginning to think this is a hardware problem, so last night i unrooted and am going to the sprint store today.
I did try force mounting, chkdsk and everything else i could find but nothing worked. fortunately i am still able to return the SD card because i have only had it for a week.

My 64gb class 10 just started doing this after i formatted it to fat32. I am wondering if formatting could be our problem.
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blazerboy567 said:
My 64gb class 10 just started doing this after i formatted it to fat32. I am wondering if formatting could be our problem.
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
Yes and no...It was stated by some members that there was a write-up saying that you shouldn't format your card because this would deduct part of it's useful life.
I never formated my card, it was inserted as soon as I bought the phone and been using it since and never formated it.
I'm going tonight to Wal-Mart and getting a card reader and seeing if that helps in fixing this. In an earlier post I attached a link to an old thread that gives a solution that seems to have helped others.

FYI, just got back from the store and it is definitely failure of the SD card reader. They tested it and my new phone comes tomorrow.

alaman68 said:
FYI, just got back from the store and it is definitely failure of the SD card reader. They tested it and my new phone comes tomorrow.
Click to expand...
Click to collapse
Sprint store? How did they determine it?
I used another sdcard that I had, 8GB, and the phone read it ok...
Edit - then does this mean that there might be a factory reset on the card reader in the SG3? :/

all they told me was that they inserted another card and it happened. Mine also fried two cards so far, so it is definitely pretty bad and i was confident it would fail any test they gave it.

alaman68 said:
all they told me was that they inserted another card and it happened. Mine also fried two cards so far, so it is definitely pretty bad and i was confident it would fail any test they gave it.
Click to expand...
Click to collapse
hm... I'll clear up a 2GB one I have lying around and see how it goes before using the 32GB Ultra.
If it happens again, I'll visit the Sprint Store on Saturday.
Do you have TEP or was it covered under manufacturer warranty?

i do have TEP but it was covered under manufacturer warranty. took over an hour, but worth having the ability to use an SD card again

alaman68 said:
i do have TEP but it was covered under manufacturer warranty. took over an hour, but worth having the ability to use an SD card again
Click to expand...
Click to collapse
Kool! The way it should be, since it's a factory deffect.
I'll test out and see what goes on...
Thanks on the update.

Hey guys
Been reading this thread, having the same issue.
Actually the only reason I post because I'm troubled of the error other then having an actual problem, this error been spawning up for me for quite a while, though it does seem to work perfectly fine.
You think the SD card could just Die one day ?
I hope you guys could determine if there's a factory defect in the SG3 or the Card, I got the international GT-i9300, I hope i won't have to return it, since the shop it was bought from is located at Poland and I live in israel (let's say that handling via warranty is not an option).
Need to check perhaps with samsung if they know of any factory defects regarding microSD card readers, My SDcard brand is Sandisk 32GB ultra class 6.

I fixed mine by completely removing the battery and putting in sd card then boot up. Sounds dumb but it worked.
Sent from my SPH-L710 using xda premium

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?

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
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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.

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.
Click to expand...
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
Click to expand...
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.

Samsung evo 256gb sd not formatting in my Note7

like my title says, i received my 256gb sd card from Samsung,so i inserted the card my note 7, the phone does not recognize the size and cannot format the sd card. anyone else have this problem? and solutions?

That's weird. I put mine right in and it worked like a charm.

Have you tried formatting in a PC using the included adapter? That could at least tell you if you got a bad card.
Sent from my SM-N930T using Tapatalk

rcobourn said:
Have you tried formatting in a PC using the included adapter? That could at least tell you if you got a bad card.
Sent from my SM-N930T using Tapatalk
Click to expand...
Click to collapse
ok a quick format actually did it, thanks @rcobourn . usually these sd cards work str8 out of the box, didnt really think it need to be formatted.

babycharm00 said:
ok a quick format actually did it, thanks @rcobourn . usually these sd cards work str8 out of the box, didnt really think it need to be formatted.
Click to expand...
Click to collapse
Well, mine didn't need to be formatted. Most likely the card just wasn't seated correctly, and removing and replacing it fixed your problem. The card tray seems a bit flimsy. Either way, whatever fixed it, glad to hear your card is working.
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