3 year old Lexar 1 gig cf card in nikon d 70 said no images in this folder,but there at least 100 jpegs were in there. Took card & batteries out and put back many times, as this has happened before. It always solved the problem.After a while of this message...a new message : format card,Which I did not do, instead I took a shot which came out, and more shots after that. I have not tried a new card.
Hoping this is not a camera problem...does anyone have a opinion or theory?