[xKrNMBoYx]

Visitor: also tried 8
Stewart: Thank you.\
Stewart: I am sorry, class 10 Sd card might not be compatible with the device. Please try to check with the class 4 to class 8 SD card.
Visitor: But on your site it shows 32gb class 10 for samsung s3
Stewart: I am sorry, there is no such information on our Website about the class.
Visitor: Samsung sells sd cards for samsung s3 correct?
Stewart: Yes.
Stewart: For product information or assistance with ordering please call Customer Support at 1-800-757-0280 to reach a Samsung Accessory Specialist.
Visitor: if so, the sd cards you show are rated 32gb class 10.
Visitor: If this is not correct, then samsung should be specific as to what gb and clas is appropriate
Visitor: for the samsung s3
Stewart: I apologize for the inconvenience.
Stewart: But as per the information we have Class 8 is compatible with the S3 devices.
Visitor: Since you do not have any complaints regarding this issue, I will forward to forums and friends so they may voice their dilemma. I thank you for your time.

From what I know there is no such thing as a "Class 8" flash memory product..at least not anymore. Also Samsung sells microsd cards in different Speed Classes. Each Description and Title specifically states the class on their website. Not only that the class # is branded on the memory card itself so you should be able to know just by pictures. Samsung has Class 4, 6, 10, 10/UHS 1 version memory cards for 4GB, 8GB, 16GB, and 32GB.

[DirtbikeD]

wierd... the exact same thing is happening to me right now... ive got a sandisc 16gb card, and no matter what, it just keeps giving that message. thats actually why im here!

[Damiensrules]

I just got done reading this thread and hopped over to SanDisk Chat Support...
After explaining the issue that after 2 weeks of use my Galaxy S3 was not reading the 32GB Ultra class 10 MicroSD (message stating I "can safely remove my SD card", but never allowing it to mount or format otherwise) and when I tried accessing the data on my PC nothing came up at all as a drive, they advised:

Brad G.: As the memory card is not working in your phone and the computer in that case I can replace the card for you and you should not face any issues again with the new card.

This makes me believe that there was an issue with the SanDisk (and possibly other manufacturer's) cards that has now been recently resolved as stated earlier in this thread. If you are having this problem, I would definitely recommend talking to SanDisk, or whatever manufacturer of the MicroSD you're using.

[pope_acute]

hmm..exact same crap happening to me had the 32gb ultra sandisk for 2 months, no issues, jellybean rooted. Change to v36 omega rom, then stared getting blank sd card message. Coincidence maybe, haven't tried changing back to stock jb to see if it makes a difference but i think it wont after reading all the other issues there have been. Although i tried a number of things pc wont format it phone wont either, so i just left it in the phone low and behold 2 days later it was available again so i was able to copy everything off, then 4 days after that its gone again...very flakey indeed. Might try the chat thing with sandisk see if they can send a new one that does with the s3. Or maybe just get samsung 32gb sd card just so i know it works.

[jzwerlz43]

i have a class 4 sd card and have the same issue.... it worked properly for 2 months its brand new and today it just did the same thing as urs... tried formatting it still didnt work... thank god for google plus instand upload and dropbox

[TURBOSPARTAN]

So I put in my 32GB Sandisk Ultra Class 10.... and today it already corrupted and I lost about 800 photos. Most of the more recent photos from that 800 did not have a chance to upload to Google+, as it won't let you "sync" if there isn't enough room in your internal memory. So unless they are still on the card but just won't work on the phone (I have the adapter at home) - I just lost a ton of photos.

What kind of is this? Literally, 1 day of use and it does this? Before I took it out, it wouldn't even let my phone function. It would just keep restarting. Should I contact Sandisk and ask for a replacement?

[Kelly Kearns]

So I put in my 32GB Sandisk Ultra Class 10.... and today it already corrupted and I lost about 800 photos. Most of the more recent photos from that 800 did not have a chance to upload to Google+, as it won't let you "sync" if there isn't enough room in your internal memory. So unless they are still on the card but just won't work on the phone (I have the adapter at home) - I just lost a ton of photos.

What kind of is this? Literally, 1 day of use and it does this? Before I took it out, it wouldn't even let my phone function. It would just keep restarting. Should I contact Sandisk and ask for a replacement?

I really think it is an issue with SD ultra. Mine is not "ultra" it is older, never been a problem and most if not all of the posts I have seen on this concern the "ultra" card.

[Shaggydaze]

I have the same issue.

I got the 16g phone a couple weeks ago and added a 64g SD card.

I have hours of songs on SD card. It played them flawlessly for hours the first couple days. Now it will play music for a couple hours and out of no where it will only play 1-2 seconds of the song and go on like this for every song or it doesn't play them at all and get "unable to read this type of file". I will un-mount SD card and re-mount. It will work again sometimes. Repeat until it does work.

The card was formatted correctly and I load the music on it from laptop. Never had this issue with my old Droid Global but have an issue with it on my Samsung Galaxy S3.

If there is a fix, please advise.

[Mesasan Ionut]

I can tell you for sure that the class of the card and manufacturer is not the problem. I have a galaxy s2 and i used a genuine samsung 8gb class 6 micro sd card. It works perfectly fine with the s2. I upgraded to s3 in december and i took the card from my s2 and popped it in my s3 and since then the problems started. I formated the card under windows and from the phone but still no help. I gave up the ideea and popped the card back in my s2. It works perfect with it... Now i`m browsing ebay for a new card for the s3 but i don`t know what to buy as the genuine samsung card did not work with my s3. So...just to be clear,the class,the size,and the brand had absolutely no importance for me...

[AxlMyk]

Should I contact Sandisk and ask for a replacement?

I did, and got a new one mailed to me.
Bought a SDXC 64g card.

--Tapatalk 2 on SGS3.

[TURBOSPARTAN]

I did, and got a new one mailed to me.
Bought a SDXC 64g card.

--Tapatalk 2 on SGS3.

How long ago was that? Have you had any issues with the new card?

[fuzzy3996]

Guys,

I had the exact same problem. I am using a Sandisk Ultra Class 10 32GB mSD card (loaded with pictures, music, videos, books etc, with only 4GB free space), purchased in Nov-2012. Before I upgraded to this, I was using a Sandisk Class 4 32GB card without any problems since I bought my S3 in Jul-2012.

For the past couple of months, whenever I press the power key, I will see the notification "SD card not found", then immediately, the card is found and everything works as usual.
Then, suddenly yesterday, I got the message "SD card corrupted, reformat?"

Of course I chose 'NO", then I re-booted the phone, and everything works.

This afternoon, the same "SD card corrupted, reformat?" came up and after I chose No, it automatically dismounted my card. Since then, The card cannot be read by my S3, even after I reboot. BUT, when I plug it into my PC, it works.

I started to search the forums and found that a lot of people has the same problem.

==> I just managed to get it to work!

I am not sure if this is the solution, but, after checking the forums, a lot of people are recommending that I format the card to FAT32. So, I backed-up my card, then, on a whim, decided to delete some videos until I have about 7GB free space, and plug it into my S3.

The card was recognized and seems to be working now. When I press the Power key, I no longer the the "SD card not found" message!!

Can it be that if we load the card above a certain amount of space, the S3 starts getting problems with recognizing the card?

Anyway, for the past hour, the card seems to be working fine and my S3 recognizes my Class 10 32GB Sandisk card. Will try for a couple more days and if it still works fine, then, this may be a temporary solution.

Let's see.. Will keep you posted.

[jt610]

I had the same problem. Every time I turn on the phone, there was an error message "SD card not found". Today, when I woke up, I saw the same message when I turned on the phone (S3), but te message was not go away. I further look in the settings->storage, and it was no help. I plug the Micro SD into my PC, it is not detectable. Tried with several Samsung phone, PC, but it still not detected. I have the San Disk 32G Class 4 Micro SDHC.
Can anyone advice me how can I recover the card, so I can do the backup of my Micro SD card which I had not done.
PLEASE!

[mecanoe]

My Lexar 16 Gb high speed SD card was working fine for several months. It stopped working while the card was in the phone and had just copied a large group of files and folders to it using Windows 7 and a USB cable.
I read a preceeding note about formating the SD card with a Mac. Therefore, I tried formating the SD card using an old XP computer. The phone can now read the card.

[AxlMyk]

How long ago was that? Have you had any issues with the new card?

It was mailed to me a couple months ago. I haven't used it because I put a SDXC 64G card in the phone. No problems with the SDXC. I DID NOT FORMAT IT.

--Tapatalk 2 on SGS3.

[RedorBluePill]

Guys,

I had the exact same problem. I am using a Sandisk Ultra Class 10 32GB mSD card (loaded with pictures, music, videos, books etc, with only 4GB free space), purchased in Nov-2012. Before I upgraded to this, I was using a Sandisk Class 4 32GB card without any problems since I bought my S3 in Jul-2012.

For the past couple of months, whenever I press the power key, I will see the notification "SD card not found", then immediately, the card is found and everything works as usual.
Then, suddenly yesterday, I got the message "SD card corrupted, reformat?"

Of course I chose 'NO", then I re-booted the phone, and everything works.

This afternoon, the same "SD card corrupted, reformat?" came up and after I chose No, it automatically dismounted my card. Since then, The card cannot be read by my S3, even after I reboot. BUT, when I plug it into my PC, it works.

I started to search the forums and found that a lot of people has the same problem.

==> I just managed to get it to work!

I am not sure if this is the solution, but, after checking the forums, a lot of people are recommending that I format the card to FAT32. So, I backed-up my card, then, on a whim, decided to delete some videos until I have about 7GB free space, and plug it into my S3.

The card was recognized and seems to be working now. When I press the Power key, I no longer the the "SD card not found" message!!

Can it be that if we load the card above a certain amount of space, the S3 starts getting problems with recognizing the card?

Anyway, for the past hour, the card seems to be working fine and my S3 recognizes my Class 10 32GB Sandisk card. Will try for a couple more days and if it still works fine, then, this may be a temporary solution.

Let's see.. Will keep you posted.

Having the exact problem here. Bought an Ultra San Disk 32gb in the US, in October 2012, Made in China, and it worked until some 10-15 days ago when the phone started reporting SD card unrecognizable, need to format, etc. Today it gave me "sd card blank" message and now the phone no longer sees the ext sd card. The phone is from 3 UK, latest Android.

Tried the card reader, it sees the card but wants to format it in order to access, so it is bye bye data. Thanks a lot Samsung (and San Disk). I hope at least after formatting it to FAT32 as advised here I'll be able to use it.

One good thing I noticed is that my Contacts were now opening much faster without the SD card. Before I was really really really frustrated with the slooooooow opening of phone/contacts function, like it usually takes 10 seconds to just reach the contact list. I honestly had an urge to smash it several times. It's a huge fail for a quad-core processor monster phone.

[AxlMyk]

READ THIS!!!!
SD Cards failing in Galaxy S3: Samsung's insane response.

[alekos5897]

Hello there!!! the same problem here!! i have my galaxy s3 16gb for 5-6 months!! i bought a micro sd card toshiba sdhc 16 gb class 4!! it worked fine but after 5 months now my s3 says sd removed unexpectally and it doesn"t read the micro sd card now!!! i had music photos everything!the sd card also my computer cannot read it maybe it fried my sdcard like a chicken in a oven!!! any sugestions any help?? i want to buy another sd card, what brand or what class ?? i don t wanna have the same problem again!!! thanks!

[KD6FTR]

I've had a SanDisk 32 GB class 4 micro SDHC card in my Verizon Wireless Samsung Galaxy S3 for the past 3 months. Everything was flawless...and then...one day...I started getting the error messages about the card being removed, remounting and finally nothing. I just spent the last 5 minutes in Live Chat on Sandisk's web site. They are going to send me a new card to replace my old one.

Samsung Live Chat was like talking with a robot. However, I was told by the agent that any class of micro SD card was supported by the GS3. See my chat transcript below.

Sandra: Hi, thank you for contacting Samsung Technical Support. How may I help you today?
Visitor: Just a quick question regarding which class of micro SD cards a Samsung Galaxy S3 can accept?
Visitor: The web site only shows it can handle up to a 64GB micro SD card. No mention of class limitations.
Sandra: I understand your concern.
Sandra: I should inform you that, you can use class 10 Memory cards on the phone.
Visitor: Are there any limitations to which brands Samsung will accept?
Sandra: No, it will accept no limitations.
Sandra: Please go ahead.
Sandra: Scan disk cards.
Visitor: So a SanDisk, 32GB class 10 card should work without issue?
Sandra: Yes, you are absolutely correct.


I have an idea of what might be causing the problem with the cards failing. I noticed that my GS3 tends to get pretty hot with my OtterBox Commuter series case on it. I think an informal poll should is necessary in order to try to help troubleshoot.

Have you had one, or more, micro sd card failures and have an external protective case on his/her phone?

Anyone have the failures who has never put an external case on his/her phone?