A is a file format used to reduce the size of PSP game images. Standard PSP games are typically stored as ISO files—1:1 digital copies of the original UMD (Universal Media Disc). While ISOs offer perfect compatibility, they are often bloated with "dummy data" used to fill up physical disc space.
Connect your PSP to your PC. Look for a folder named ISO in the root of your memory stick. If it’s not there, create it. cso psp archive
Would you like a or a bash/PowerShell script to batch-convert all your ISOs to CSO? A is a file format used to reduce
Connecting a PC and a PSP™ system using a USB cable - Playstation.net Connect your PSP to your PC
: A newer alternative utilizing the LZ4 algorithm. While it offers faster decompression speeds, it generally provides slightly worse compression ratios than CSO.