I would add to the good advice above that, although the procedure can be pretty daunting, there are ways to recover information lost on a memory card. A terrible computer crash a while ago erased my links and downloads for this issue, but if you look on line, you should be able to find something. There is a program that opens a Dos screen and is capable of finding just about anything on a card and reconstructing it. Name forgotten, but if I find it I'll post back. In any case, if you have clobbered the card and if the images were vital, I'd spend some time hunting for recovery programs.