# Download maxcso.exe (Windows) or compile on Linux/macOS maxcso -o game.cso game.iso
The "CSO PSP archive" exists primarily as a tool for . As UMD drives fail and physical discs succumb to "disc rot," these archives ensure that the hard work of thousands of developers isn't lost to time. cso psp archive
Before diving into archives, let’s clarify the format. A standard PSP game dump is an —a sector-by-sector copy of the UMD (Universal Media Disc). An ISO is raw, uncompressed, and takes up significant space. # Download maxcso
If you are using a modern microSD adapter with your PSP or playing via an emulator, CSO archives are excellent A standard PSP game dump is an —a
The primary reason to use CSO archives is to , allowing you to fit significantly more games on a single memory stick. ISO (Standard) CSO (Compressed) Size Large (Original UMD size) Small (Compressed up to 9 levels) Load Speed Fast (Direct read) Slower (CPU must decompress data) Compatibility Universal on all CFW High, but some heavy games may lag Portability Harder to share/download Easier due to smaller file size
: A "PSP archive" generally refers to a collection of PSP game backups (ISOs or CSOs), save data, or firmware updates. A CSO is the compressed format of a PSP ISO.