I suspect that any files should remain. It depends on the name of the file. >>> r-carter@xxxxxxx 05/04/05 11:16AM >>> Hi, I just formatted a 256 meg flash card on the Book Port. When I look at the card in my card reader, I see that the card contains one 8k hidden file. Is this normal after a format? Should I try to get rid of the file or does the card use it for its own purposes? Thanks, Robert Carter