I bought a Memory Stick Pro Duo on ebay. 11$ for 4GB, it seemed too good to be true. It was. The camera took a while to boot, and then said "Format Error". I tried many times to format it manually, with the same result each time. I then tried to format it with my MBP, but the computer didn't even recognize the card. In System Informations, I could see the camera, but not the memory stick. As a last resort, I put it in a PC, using a Memory Stick (the old ones) adapter. The PC saw the adapter, but not the memory stick. I managed to get a refund, but before I throw it away I figured out I should ask what to do here. Any ideas, or is this memory stick only good for the garbage?