I've been ripping my UMDs to ISOs and using UMD Gen to try and get the file sizes down a bit, but pretty much all I've been able to do in most is delete the Update. And I deleted the extra languages in one. But I feel there's bound to be more I can do, because the file sizes are still pretty big. I have heard using CSOs is not recommended, so I have kept them all as ISOs. But is there somewhere I can find lists of what files I can remove/dummy from specific games to decrease their file size?