If you have an ureadable memory card with images on it, we strongly recommend you contact the digital camera or card manufacturer. We do offer some very basic information relating to this issue, which you may want to read first:
http://www.digicamhelp.com/accessories/memory-cards/corrupted-memory-card.phpThere are also several discussions on the subject that contain possible fixes in this section of the Forum:
http://www.digicamhelp.com/cgi-bin/yabb/YaBB.cgi?board=accessTo recover images, use an image recovery program. (note: if you card is unreadable in the camera try a memory card reader).
http://www.digicamhelp.com/processing-photos/photo-recovery/You may want to try a free photo recovery program before spending money for one. However free programs may only recover JPEG files. One free recovery program is listed here:
http://www.digicamhelp.com/processing-photos/basic-editing/free-software.php