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AC Question Phone just stopped reading sd card out of the blue, it is a galaxy note edge, and i am puzzled as to why!!!! What could the issue be????
I would suggest backing up the SD card to a computer or another storage device. Format the SD card and re-insert it; see if that fixes the problem. If it doesn't, then its either a damaged SD card or SD card slot. The only way to test is to re-insert a new card and see if that works. If not, it's a possibility that the device has damaged hardware.
If that's the case you can see if Samsung will assist with a repair/replacement if covered under warranty.