Can't reformat the MicroSD I've been using in the Sansa Connect

MP3 players All other MP3 players
4

I tried another card reader on another PC and it’s giving the same problem. The card shows up as a removable drive in windows but it won’t read or format. The windows Disk Manager can’t find it either. If the card wasn’t working in the Sansa I’d think it was broken, but it still works fine in there.