: Traditional archive formats. While they offer the highest compression, most emulators cannot play them directly; you must extract them to Essential Tools for DIY Compression
You will see websites advertising "Ultra High Compression" or "1MB PSX ROMs." You cannot compress a 600MB CD-ROM into a 10MB file without destroying the game. Psx Highly Compressed Roms
A standard PSX game disc could hold up to 700MB of data. When you rip a game from a CD to create a ROM, it usually results in large file sizes. If you have a 32GB or 64GB phone, storing 20 or 30 of these games can eat up your storage almost instantly. : Traditional archive formats