A full PSX library (~4,000+ discs) can take over 2 TB in raw .bin/.cue format. With CHD, you can cut that down to ~1 TB or less.
: It consolidates the messy "multi-bin" or "bin/cue" structures into one single .chd file per disc, making your ROM folders much cleaner. chd psx roms
Explaining how to use them on a (like a Steam Deck or Anbernic) Troubleshooting multi-disc games (M3U playlists) A full PSX library (~4,000+ discs) can take over 2 TB in raw