When you were taking pictures with the camera did it have an Add-in SD or SDHC memory card? An SD card is more for older cameras and card readers with a limit of 2GB, the newer SDHC card [High Capacity] starts at 4GB and goes up in multiples, largest I have is 64GB. Was the camera set up to use Internal memory or that card? Some cameras will automatically switch to Internal memory if the card is missing. Do you have a card reader in the computer or an External USB Card Reader? I have gotten them at Wal*Mart for $10 or $20, works great to check what is on the card. One other thing, cards being used in a camera need to be formatted/reformatted in the camera, not in the computer as the camera may no longer recognize them.