The original Forza Motorsport 4 is a two-disc masterpiece. A raw rip can take up nearly 16GB of space. By using the XISO format, you’re essentially "trimming the fat." You get the exact same game, the same 4K textures (via mods), and the same engine sounds, but often at 20-30% less disk space. For those with massive libraries, those gigabytes add up quickly. 4. Easier Mod Integration