Hi.... I've been using a 1GB Lexar Compact Flash card with my Nikon D70 for over a year. Suddenly, when I try to read the card with my computer using a card reader or printer, the computer gives an error message telling me that I must "format the card" before I can use it in the drive. Then, when I put the card back into my camera to look at the photos, they do not appear anymore in normal playback mode. I thought that I had lost them until I tried playing them back in the camera with the camera's slideshow option. Waaa-laaaa....the photos are still there. Does anyone have any suggestions or experience with this? What do I do in order to retrieve my photos on this card? Is it a camera error or is it time for a new card or ????? Thanks for any help!