I had my 4G SD card in my camera, had several hundred pictures on it, some downloaded and some not. I put the card into my HP mini and now the memory went down to hold a max of 7 pictures and all the old ones are not showing anymore. Please help. I downloaded a couple of programs to retrieve them, but they seem to want to scan my entire PC and not just the card. I am on a desktop computer now, with the USB connected to the camera (card inserted in Canon camera) trying to retrieve. I'm at a loss. These were pictures of my 4 kids, one being my newborn. :-( I don't have a clue what to do to get them back, if I even can.