: If you find CSOs too slow, some archives and CFW now support

strips away that unnecessary data and compresses the actual game files, often reducing the file size by 30% to 60% without losing any gameplay content. The Benefits of Using a CSO Archive

/PSP Archive /Action God_of_War_Chains_of_Olympus.cso /RPG Persona_3_Portable.cso /Sports FIFA_14.cso

CSOs are natively supported by Custom Firmware (CFW) on original PSP hardware, the PS Vita (via Adrenaline) , and the PPSSPP emulator . ISO vs. CSO: Is There a Catch?