PCSX2 natively supports advanced compression formats that significantly reduce your library's storage footprint. 1. The CHD Format (Compressed Hunks of Data)
Software that pretends to extract the game but actually installs adware. How to Compress Your Own PCSX2 Games Safely pcsx2 games highly compressed work
A 4.3 GB game like Grand Theft Auto: San Andreas can shrink significantly, allowing you to fit more games on your SSD or MicroSD card. How to Compress Your Own PCSX2 Games Safely A 4
CSO is an older format widely used for PSP and PS2 emulation. It compresses the ISO into blocks. The most effective tool for creating CHD files
The most effective tool for creating CHD files is , which is distributed as part of the MAME emulator package.
Most "highly compressed" files you download are simply archives. While the download is small, you still need the original amount of space on your hard drive once you extract the ISO. PCSX2 cannot run a .rar or .7z file directly. 2. Compatibility with CSO and CHD Formats