after a shoot I put card (CF) in card reader in the PC and nothing happens, no reading I then put card back in camera ( Canon EOS 1DS Mk3) and it now says card needs to be formatted. I have tried six different cards (all formatted many times) and three different card readers so it must be a camera fault can anyone help ( thankfully I have the images on the SD backup card.)….Thanks you . Robert Allen.
Are the pins bent inside either the card reader or the camera? I’ve seen this problem with students cameras before, if a single pin is bent then pushing the card fully home flattens it. In cases like this data gets corrupted as it’s written to the card,