A single PSX game can sometimes consist of dozens of .bin tracks (especially games with CD audio). This makes your ROM folders look like a disaster zone.
If you have ever unzipped a PSX game and seen a .cue sheet plus a .bin, then another .bin, then a .ccd, then a .sub... you know the pain. Managing multi-track games (like Gran Turismo or Metal Gear Solid ) is a nightmare for file organization. chd psx roms exclusive
If you are using older emulators like ePSXe, you will need to extract the CHD back to BIN/CUE using chdman . A single PSX game can sometimes consist of dozens of