Psp 352 M33 Upgrade To 660 Instant

Here’s a complete, step-by-step guide to upgrade your PlayStation Portable (PSP) with Custom Firmware 5.50 GEN-D3 / 5.50 Prometheus (or 5.00 M33-6) directly to 6.60 PRO-C2 (or 6.61 PRO-C2), including all necessary files and precautions.

  • Backup saves & plugins – Copy ms0:/PSP/SAVEDATA and ms0:/seplugins to PC.
  • Disable plugins – Rename seplugins folder to seplugins.bak.
  • Format Memory Stick (optional but recommended for stability).

    • To upgrade a PlayStation Portable (PSP) from the ancient 3.52 M33 custom firmware to 6.60, you cannot jump directly through the standard update menu. psp 352 m33 upgrade to 660

    Download the OFW 6.60 EBOOT.PBP file from a reliable source like the Official PlayStation Manuals or WikiHow Guide. Here’s a complete, step-by-step guide to upgrade your

    4. Restore Your ISO/CSO Games

    Copy back your ISO folder from your PC backup. Place ISOs in ms0:/ISO/. PRO-C2 supports all ISO formats, including compressed CSO and DAX. Backup saves & plugins – Copy ms0:/PSP/SAVEDATA and

    Verify the Update: After the PSP restarts, go to Settings > System Settings > System Information to verify that the firmware version has been updated to 6.60.

    Game Compatibility: Older M33 firmwares cannot run newer PSP games or backups without tedious patching.