Moving from 3.52 M33 to 6.60 is like upgrading from Windows 98 to Windows 10. The interface is familiar, but the backend stability, driver support (plugins), and software compatibility (games) are vastly superior. While the M33 legacy will always be respected, 6.60 PRO/ME is the definitive end-of-life firmware for the PSP.
(Fat), 2000, 3000, or Go. If you have a 3000 or Go, the 6.60 PRO-C2 temporary firmware is safer. psp 352 m33 upgrade to 660 portable
Modern custom firmware, specifically or 6.60 ME (Minimum Edition) , offers superior game compatibility, better plugin support, and a built-in PS1 emulator that doesn't require complex popsloader setups. Moving from 3
custom firmware. PRO-C2 is widely recommended for its compatibility. PSP: Updating from the 3.xx OE CFWs to the 6.60 ME CFW (Fat), 2000, 3000, or Go
Copy all three folders ( PROUPDATE , FastRecovery , CIPL_Flasher ) and drop them directly into your console's storage path: MS0:/PSP/GAME/ .
To get the best experience, you'll want to install modern plugins.
Follow the on-screen prompts to complete the installation. Your PSP will reboot into official 6.60. Troubleshooting "9.90" or "DADADADA" Errors