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Root [MetroPCS/CDMA] sd card keeps malfunctioning

I have a galaxy S3 from METRO PCS. my issue is that the SD card keeps malfunctioning. it works well for a while then all of a sudden its unsupported. is there anyway to fix this. it would make me so happy. I have a 32 GB SD card that i cant use. Its a Lexar Highspeed 32 GB Micro SD card. Help please :(

Have you tried a different SD card.I think Lexar might be your problem.
 
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I have a galaxy S3 from METRO PCS. my issue is that the SD card keeps malfunctioning. it works well for a while then all of a sudden its unsupported. is there anyway to fix this. it would make me so happy. I have a 32 GB SD card that i cant use. Its a Lexar Highspeed 32 GB Micro SD card. Help please :(

I had the same problem with a 16 GB SanDisk.. I brought it back to Target (where I purchased it) and exchanged it for another one. The replacement worked prefectly, and the problem was definitely a faulty card the first time around.
 
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