I have corrupted data on my PS2 memory card, and it won erase. Do I have to buy a new one?
You can also use either: Datel Memory Manager / Memory Manager Plus (both available with or without Action Replay) With memory manager, go to the screen where you select the device to browse, highlight the memory card and hold L1+L2+R1+R2+Square. It will ask if you wish to format the memory card. With memory manager plus, holding Square is not needed (I think).