I'm having a problem with my PSP. I have two memory sticks; one 4GB, one 8GB. They're both Sony labelled. The 4GB works flawlessly. The 8GB, however, seems to have a few... problems. I would copy games and homebrew onto it, and SOME of them would work. After I got a select few on it to work, no more would show up, even though the file was on the stick and there was plenty of space left over. Troubled, I formatted the memory stick and tried again. This time, a -different- set of the games showed up, I copied the same files, but instead of, say, games A, B, and C working, games C, D, and E showed up on the PSP. I formatted again and tried again, with similar results. However, I have now noticed that when I place anything in the PSP/GAME folder, it is automatically deleted. No, I have not played Rockband: Unplugged.