I still use UMDGen4 and do the optimize on every game. I tend to keep it as an ISO file, as I am not sure which type of games should be compressed and which shouldn't. Usually can fit about 4 games on my mem card. What are others able to fit? Do most people still use UMDGen4 to trim/covert to cso?
convert them to .cso, they compress down so much. plus you can search cso's also and not have the hassle of compressing the files
sometimes cso can run not aswell as iso because of the compression things like no vioces only text when then should be vioces etc. just little things but cso are much smaller generally.