Once you go CHD, you never go back. The format is now supported for , Sega CD , and Dreamcast (Flycast) . If you are building a "top" retro collection for a Steam Deck, Batocera, or RetroPie, consider converting all your disc-based systems to CHD. It saves terabytes of storage.

CHD is a compression format that allows large game files to be shrunk into manageable sizes, making it easier to store and distribute ROMs. For PSX games, CHD ROMs provide a great way to experience classic titles without the need for original hardware or cumbersome game discs.