So I'm trying to put homebrew apps and games on my PSP, so I put them in PSP/GAME since they were in pbp format, but on the PSP they showed as corrupted files. I put the card back in my computer and the folders with the games in them were empty. I also checked and it appears that any new files I try to add are automatically deleted, even if it's in a folder with no association with anything to do with the PSP itself. If it helps I have a PSP-1000 running PRO 6.20 CFW