08-31-2015 07:38 AM
@Moto007 has given some great suggestions.
@Bhupesh_1856 , is this a new card or a card you've used on other phones? First, please try formatting the card. If it's an old card and you're still having issues, then it's possible that the card is going bad and I'd recommend replacing it. If this is a new card, and you're still having issues then please let me know the Make/Model/Class of the SD card.