I had the same problem with the microsSD cards... it is cracked.... send it back to the manufacturer for replacement.
The card could be formatted incorrectly or you put it in up side down or it is not completly snug in the socket to reformat the card you will needa micro sd adapter or a micro sd USB adapter if your computer does not have an sd card slot then put the card into your computer and it should show up as a thumbrive style storage device you can then right click and reformat DOING SO WILL ERASE ALL DATA ON THE CARD this works in windows xp and 7
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