Galaxy S4 MircoSD card (HC Class 6 32GB), just stop being recognized by the phone. Worked fine since I had the phone. No update was done, phone just stop recognizing the SD Card. Mount SD Card is greyed out.
I have read that this is a problem sometimes with the Samsung G3 and G4. Try powering off the phone, then remove and replace the card.
Failing that, perhaps put the card in a card reader on your pc and copy all the contents off, then reformat the card as FAT32, replace in your phone and see if that works.
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