How do I get my Samsung Galaxy Core to read my SD card

B. Diddy

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Welcome to Android Central! The SD card could be corrupt, defective, or counterfeit. Install SD Insight to see if the card is genuine or counterfeit. Counterfeit cards are programmed to report more storage than they actually have, and if you try saving more than the card can actually hold, then files can start getting corrupt.

If it's a valid card, then go to Settings>Storage, Unmount the card, remove it, and insert it into your computer. Can the computer read these files? Backup as much as you can right now, then run chkdsk to look for bad sectors: http://forums.androidcentral.com/am...guide-using-chkdsk-fix-corrupted-sd-card.html
 

Rukbat

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Files can be recovered from a card mounted in a computer - PhotoRec. Even if the card is corrupted, as long as the files aren't, it'll recover them. (Start Linux formatting an exFAT card and you've destroyed the filesystem. PhotoRec never looks at that, it looks for files - and will find them.)