was originally developed for arcade games (MAME). It compresses PS1 disc images losslessly —meaning zero quality loss—while achieving impressive ratios:
Ding.
While these formats are perfect 1:1 copies of the original discs, they are incredibly inefficient for modern storage. A standard PS1 disc can hold up to 650 MB of data. Even if a game only uses 100 MB of actual data, the uncompressed .BIN file might still take up the full 650 MB because it fills the empty space with dummy data. Multiplying that by dozens of games results in massive storage waste. Modern PS1 Compression Formats Explained Ps1 Roms Highly Compressed