I have a class 6 Turbo 4gb SD HC (somethin like that) memory card for my D80. I realized when I took a few pictures while shooting RAW quite a few of them became corrupted. It displays, "FILE DOES NOT CONTAIN IMAGE DATA." I'ts not too much of a problem since it only happened once, to like 10 pics, but I have a problem.. HOW DO I DELETE THESE CORRUPTED FILES? These things are taking up space in my memory card, and I havn't been able to delete them in all my efforts. I have tried by the computer, in-camera, everything. After I try delete one of them it says, "THIS CARD CANNOT BE USED". (although it works fine after restart of camera) Any help would be appreciated!!