I have a 2gb SanDisk microSD card 'PWNIES' (don't ask), that I have had no issues with for about a year. Just recently I plugged it in to my Mac G5 using a microSD USB reader, and it came up with the following error: "Disk Repair. The disk "PWNIES" was not repairable by this computer. It is being made available to you with limited functionality. You must back up your data and reformat the disk as soon as possible." The limited functionality being that I could only read it. I'll mention at this point that it can be read perfectly ok by everything else I have put it into. So I decided to see what I could do through Disk Utility, and the answer is nothing. It fails to verify or repair it: "Disk utility stopped verifying (or repairing) "PWNIES" because the following error occurred: Filesystem verify or repair failed." as well as erase it: "Volume Erase failed with the error: MediaKit reports bad partition or no map found.". I have no idea what to do. If I do have to reformat it, could someone please give me details/a link as to how I would go about doing that. I don't care if I lose everything on the disk, as none of it is important to me, but I would like to repair and regain proper use of my microSD. Can anyone help? I can post the verification/repair details if necessary.