Hello. I bought my Canon Rebel T2i a month ago. Today was the first time I tried uploading my photos to my computer using the EOS Utility software. When I plugged my camera into the computer, my memory card would not read. I also received an error on my camera's screen that said "card cannot be accessed". Please reinsert/change card or format card with camera. I tried reinserting several times, but if I reformat the card, I'll lose all my photos. What do I do? Thanks.