Cso: Psp Archive
Dump your UMD using Custom Firmware on a PSP. Hold the R-trigger on boot to enter the Recovery Menu, enable "USB device: UMD," then plug into your PC. Copy the UMD.ISO file.
The Internet Archive (archive.org) is a digital library. You will find "PSP Redump" collections there. These are 1:1 copies of UMDs. While downloading copyrighted games you do not own is legally gray, the Archive hosts these for preservation purposes. cso psp archive
maxcso -d -o game.iso game.cso
Or use UMDGen: Open CSO → Save as ISO. Dump your UMD using Custom Firmware on a PSP
Simple drag-and-drop tool for beginners. Or use UMDGen : Open CSO → Save as ISO