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Operating System: Android 2.2 Device: HTC MyTouch 3G Slide SD Card: Micro SD 8GB Sandisk card that is less than 1 year old

Background: This feature formatted my working SD Card w/ all my pictures on it after i took it out and put it back into the same phone. I didn't add or delete any data from the device when i took it out... I checked the sd card on the computer and it only had 2mb of cache files on it while before it had 6gb of music and photos. I already tried mounting and unmounting the card. That doesn't help. The phone has recently been factory restored.

Questions: 1) Why is Android / MyTouch3G Slide formatting my sd card?

2) How do I know if it's an sd card problem or a phone problem?

3) How do I get the card to work w/ the pictures and mp3s on there?

I'm thinking maybe I should prepare the card for android somehow- with a sd card formatter

Update: I recovered the files w Easeus Data Recovery, put them back on the card, and it formatted the files again. I'm thinking I should format my card for android 2.2 or mytouch3g so it accepts the pictures or put the card in while the phone is off to prevent this from happening again?

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  • For trying to get back data try cgsecurity.org/wiki/PhotoRec
    – adopilot
    Commented Mar 17, 2011 at 20:46
  • did you check the card on a PC to see if the files were still there? or did you just try to access the photos from the phone. I haven't experienced this before but if the sd card wasn't mounted maybe the photos appeared to be missing but weren't. or did you actually get a message that said the card was formatted? just a thought...
    – Daniel
    Commented Mar 17, 2011 at 21:26
  • @Daniel, thanks for the response! Yes, I checked for files on pc and nothing. I tried mounting and unmounting card. I added more info to my question so it's more clear. Check it out and let me know... thanks!
    – Brian McCarthy
    Commented Mar 18, 2011 at 12:59
  • @AdoPilot, thanks, I recovered the files w Easeus Data Recovery. The question is once I recovered the files, is there a file system structure I have to keep on there or other way to prepare the sd card so the phone doesnt have to "prepare"/ format it?
    – Brian McCarthy
    Commented Mar 18, 2011 at 13:01

2 Answers 2

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Android has to mount your SD card; that's all that "Preparing SD Card" does. If that doesn't happen, then the device can't use the SD card. Hopefully the format was just a fluke. You should put test files on it (unimportant / already backed up) and see if it happens again.

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  • thanks for your response. Yes, I recovered the files w Easeus Data Recovery, put them back on the card, and it formatted it again. I'm thinking I should format my card for android 2.2 or mytouch3g so it accepts the pictures or put the card in while the phone is off to prevent this from happening again?
    – Brian McCarthy
    Commented Mar 18, 2011 at 12:45
  • That's very strange. Maybe try a different card and see if the same thing happens. And I agree that removing/inserting the card while the phone is off is good to try.
    – Matthew Read
    Commented Mar 18, 2011 at 13:08
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My buddy with a HTC Evo 4G w/ Android 2.2 put the SD Card in his phone and had no problem reading the files on the SD Card. The files were on a seperate partition that wasn't recognized w/ my myTouchSlide using 2.1. He was unable to format the card with his Evo but had a card adapter and put it in his computer and formatted the card on his computer. :)

He said Best Practices are:

  • Un-mounting the SD card before you remove it from the phone
  • Putting the card back in when the phone is off
  • Backing up your SD card data regularly just in case
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