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HELP! 64GB Sandisk micro sd won't format

Last response: in Storage
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April 19, 2014 8:09:03 AM

Just got a Samsung Galaxy S5 and transferring the 64GB Sandisk micro sd from my Galaxy S4. Here are the steps I performed:

1. First, I unmounted the card safely from the S4.
2. Put it in a Sandisk brand card reader (SDHC) - I believe this is the one the card actually shipped with
3. Using Windows explorer, I right-clicked and chose Quick Format with options exFAT and 128 KB allocation unit size. It shows capacity as 59.4 GB
4. I let it run for about an hour and it never completed the job (also the process never stopped responding, which is what I expected to happen)
5. So I had to just pull the card without doing a safe-remove, which probably was not good
6. Tried just putting it in my S5 to use it's formatting function but it fails every time (tried 10 times now). It locks up the phone during the erase function and then it reboots.

Thanks in advance for any help!

Best solution

a b Ô Samsung
a c 244 G Storage
April 19, 2014 9:52:57 AM

Put it back in the card reader and see if this tool will format it: https://www.sdcard.org/downloads/formatter_4/eula_windo...

Yogi
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April 19, 2014 10:06:12 AM

Y0GI said:
Put it back in the card reader and see if this tool will format it: https://www.sdcard.org/downloads/formatter_4/eula_windo...

Yogi

Thanks, I just tried that and it says the card is write-protected, which of course, it not possible because it has no lock switch, so something else is locking it up, maybe from an unsafe removal? Or maybe it's the card reader itself. This is the exact one
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a b Ô Samsung
a c 244 G Storage
April 19, 2014 11:26:48 AM

mulox said:
Y0GI said:
Put it back in the card reader and see if this tool will format it: https://www.sdcard.org/downloads/formatter_4/eula_windo...

Yogi

Thanks, I just tried that and it says the card is write-protected, which of course, it not possible because it has no lock switch, so something else is locking it up, maybe from an unsafe removal? Or maybe it's the card reader itself. This is the exact one


Here are some tips for removing write protection from a USB flash drive. The principles should be the same for an SD card: http://www.makeuseof.com/tag/how-to-fix-write-protectio...

If that doesn't help, I would contact Sandisk Tech Support: http://kb.sandisk.com/app/ask

Yogi

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April 20, 2014 12:02:55 AM

Y0GI said:
mulox said:
Y0GI said:
Put it back in the card reader and see if this tool will format it: https://www.sdcard.org/downloads/formatter_4/eula_windo...

Yogi

Thanks, I just tried that and it says the card is write-protected, which of course, it not possible because it has no lock switch, so something else is locking it up, maybe from an unsafe removal? Or maybe it's the card reader itself. This is the exact one


Here are some tips for removing write protection from a USB flash drive. The principles should be the same for an SD card: http://www.makeuseof.com/tag/how-to-fix-write-protectio...

If that doesn't help, I would contact Sandisk Tech Support: http://kb.sandisk.com/app/ask

Yogi



Thanks... none of those methods worked. Interestingly, I get a "dirty disk" error I get when I try to copy a text to it... says to run chkdisk again, which I already did...
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a b Ô Samsung
a c 244 G Storage
April 20, 2014 7:57:04 AM

I'm sorry that I couldn't be more helpful. Like I said, contact Sandisk Tech Support. If you do, please update this thread with Sandisk's response and recommendations.

Good luck!

Yogi
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May 8, 2014 2:15:29 AM

mulox said:
Y0GI said:
mulox said:
Y0GI said:
Put it back in the card reader and see if this tool will format it: https://www.sdcard.org/downloads/formatter_4/eula_windo...

Yogi

Thanks, I just tried that and it says the card is write-protected, which of course, it not possible because it has no lock switch, so something else is locking it up, maybe from an unsafe removal? Or maybe it's the card reader itself. This is the exact one


Here are some tips for removing write protection from a USB flash drive. The principles should be the same for an SD card: http://www.makeuseof.com/tag/how-to-fix-write-protectio...

If that doesn't help, I would contact Sandisk Tech Support: http://kb.sandisk.com/app/ask

Yogi



Thanks... none of those methods worked. Interestingly, I get a "dirty disk" error I get when I try to copy a text to it... says to run chkdisk again, which I already did...


This is exactly the same thing happened to my 64gb microsdxc sandisk. It says it is write protected. It just mysteriously became like that when I was saving a dl torrent file to it unexpectedly. Im afraid it is a hardware problem. Perhaps we got bad batch of cards that Sandisk honestly claims.
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August 16, 2014 7:14:44 PM

Ahhhh, so it's game-over if the card detects a fault in itself. It locks itself and thus no matter what you do (from formatting to deleting) the BEST that you can do is restore access to the card itself (use testdisk software) and then you just have to contact warranty.

http://kb.sandisk.com/app/answers/detail/a_id/8656
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