Right now I have boxart for all 90 games, 30 thumbnail boxart (Original 30 games), and about 5-10 save slots used. It no longer displays the C8 error, having deleted most of the thumbnail boxart but it's still weird seeing little white boxes in place of the thumbnail boxart for each game. Too bad they can't find a way to update the RAM. It only has 256MB, but acts more like it has 64MB-128MB.
Update: Just removed the 30 original games and re-added them as separate ROMs and deleted all of the thumbnails. Also, I now have 99 games and I'm allowed 1 save slot per game. I hope it works, going to test it to see.