Help Can't get 64gb Sandisk sdxc card working

barregb · Jul 19, 2012

I haven't been able to get the Sandisk 64gb Mobile Ultra sdxc class 6 card working in my USCellular Galaxy S3. When I first put the card in and turned on the phone, the phone says "Preparing SD card" and then it says "Safe to Remove Card", but it won't give me an option to format it or use it at all.

The sd card is recognized by my PC (Windows 7) in a card reader so the card should be ok. On my PC, I've tried reformatting the card to both NTFS and exFAT but the phone didn't like either one. With NTFS, the phone says that there is a blank sd card and doesn't give me the option to format it. With exFAT, I get the same message I got initially, where it first says "Preparing SD card" and then "Safe to Remove Card" and the only option available in the Storage settings is "Mount SD Card" and selecting this causes the same messages to be presented again.

I've tried formatting it both using both the basic Windows 7 formatter and with SD Formatter 3.1.

Any ideas?

rkkeller · Jul 19, 2012

I have this Sandisk card and all I did was put it in and turn the phone on. It was on special for under $50 a few weeks back.

Amazon.com: SanDisk Mobile Ultra microSDXC Class 6 Flash Memory Card (619659070076): Computers & Accessories

barregb · Jul 19, 2012

rkkeller said:
I have this Sandisk card and all I did was put it in and turn the phone on. It was on special for under $50 a few weeks back.

Amazon.com: SanDisk Mobile Ultra microSDXC Class 6 Flash Memory Card (619659070076): Computers & Accessories

That's the card I have. I wonder if it might be an issue specific to US Cellular S3's as I found at least one other person who had the same issue with the same brand/model of sd card. My resolution wound up being the same as theirs. I had a co-worker try to format it on his Verizon Droid X and once he was able to do so, it then worked fine in my US Cellular S3.

JubbaTheHutt · Jul 19, 2012

Have you attempted to format the card when it's inserted into your S3?

Settings > Storage > Format SD card

Note: Doing this will erase ALL data on said sd card.

ScienceMom77 · Jul 19, 2012

I am having the same problem, and I too have a US Cellular GSIII. When you "Mount SD card" it says the same thing, "Preparing SD card" then "SD card is safe to remove". Well, I don't want to remove it, I want to format it! Any solutions besides having a friend format it? (nobody here but me...)

Thanks!

barregb · Jul 19, 2012

JubbaTheHutt said:
Have you attempted to format the card when it's inserted into your S3?

Settings > Storage > Format SD card

Note: Doing this will erase ALL data on said sd card.

That's part of the problem. There was no option to format the SD card from the phone. If I use a 16gb or 32gb, I see that option, but I wasn't seeing it with the 64gb option.

djedgarftw · Jul 20, 2012

Try formatting it on the computer first

sparksd · Jul 20, 2012

Here's a thread on S3 exFAT issues over at xda --

[Q] exFAT file system on microSD cards - xda-developers

I ended up formatting my 64GB card as FAT32 because I ran into the issues ID'd in that thread.

Dave

romshark · Sep 12, 2012

barregb said:
I had a co-worker try to format it on his Verizon Droid X and once he was able to do so, it then worked fine in my US Cellular S3.

Just got my 64GB card and had the same problem. Thanks to this tip, I got it formatted and working using my old Droid 3, and it works in my GS3. Just as a test, after that I formatted it on a PC with exFat, and made sure it wouldn't read in my GS3. Then I was able to format it on my old Droid 1 also.
So there must be something wrong with the way GS3s format these things.
Using a Verizon version of the GS3 with a custom bootloader and custom Rom here.

nativerobot · Sep 25, 2012

I don't know if anyone else was running into issues formatting as fat32 like I was. I was formatting as fat32 but the problem I was having is that I was setting my partition to logical and not primary which was causing it to not mount while in my phone. (I decided to just skip exfat since it was corrupting the fs as soon as I attempted to mount while in the phone)

Spent too long trying different file systems until I realized that I wasn't setting my partition correctly. Should be easy enough to do in diskpart or if you're more visual you can use minitool partition wizard.

THE W · Jan 16, 2013

just bought a samsung 64GB micro and had the same issue.

popped it into my Lg motion, formatted it, put it into my S3 and now its good to go.

Help Can't get 64gb Sandisk sdxc card working

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