My memory card was working fine but then all of a sudden it won't get detected by my PSP. I assume that I would need to format it, but I will lose some of my precious game files, movies, and photos. I tried to connect my PSP to a PC with a USB connection but I can back up the files that way because the computer can't pick up on the memory stick since the PSP doesn't detect it. Is there any way I can back up my files before I format the memory stick? or did I lose it all?