The 30 per folder was so that you could have 4 save states per game. You could technically go up to 100, but just reduce the number of overall saves. On SNESC, compression has nothing to do with it. But, we run into issues once you pass 60 games, such as failure to load art, and so on. I tested this out pretty much the day I got the SNESC
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Nope, it is what it is. In cases like these, your only option is to try it on different Arcade Cores and hope for the best. But, in these particular cases, I do not think either ever have better sound.