SD card not showing up in storage

**JohnnyRanz** · 12-12-2012, 12:22 AM

So the other day my worst fear struck me again. My previous phone, an HTC EVO LTE had the same issue. I had to keep ejecting and putting back in my sd card. Finally I bought a new one and it was working fine. I got the S3 last week and it only took a week for my 3 week old memory card to act up. So I ejected it and put it back, and worked. Now since then, it happened again and now my phone doesn't recognize my sd card at all. This is my screenshot with my 3 week old sd card inserted. Please help!

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**Buddlespit** · 12-12-2012, 05:31 AM

If you plug the card into the computer via a card reader, does the computer recognize the card? If not, then you have a card problem. If it does read it, then you have a phone problem.

**ncwitz** · 12-12-2012, 07:49 AM

I posted about the same problem in the general Samsung Galaxy S3 forum: http://forums.androidcentral.com/sam...ecognized.html

* Same message about to "Mount SD card"... but nothing happens.
* Same message with the card in another S3
* Card does work in an external card reader attached to my PC (I was able to copy all of the data from the card to backup)
* No option to reformat the card... it doesn't even recognize that a card is inserted.

So... is the the card or the phone, or, in this case, two different S3s that don't see the card. This is a PNY 32 gb class 10 card. A particular problem with the S3 recognizing the PNY cards for some reason?

**DoesItMatter** · 12-12-2012, 02:47 PM

Prob with 32gig MicroSD - thoughts?

Might be similar issue to that user.

If the card is being recognized in the computer - try to do a full wipe/format

Once you backup (or looks like you've already backed up the sdcard) use that utility to completely wipe/reformat your microsd.

Then power off the phone, insert the card, power up and see if it recognizes it.

**JohnnyRanz** · 12-13-2012, 10:57 AM

I put in my old sd card and it works. Looks like my 3 week old memory card is broke already ugh

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**jdwintx** · 03-20-2013, 11:10 AM

Well as of today here is the answer.

SanDisk Responsible for Malfunctioning Galaxy S3 Micro-SD Cards
SanDisk is now claiming responsibility for Samsung Galaxy S3 issues that users complained are killing memory cards and randomly leaving users with dead batteries.
According to SanDisk a newly documented problem that effectively fried SanDisk micro-SD cards was in fact a manufacturing default.