Less common for PS1 but frequent in the PSP scene; it’s a block-based compression that allows for decent space savings. The "Rip" vs. "Full" Debate
Avoid "highly compressed" rips. Use CHD (lossless compression) which reduces file size by ~30-40% without sacrificing audio, video, or gameplay. psx games highly compressed
You don't have to rely on sketchy download sites to get compressed files. You can convert your own legal backups using these free tools: Less common for PS1 but frequent in the