Before installing modern CFW, you must move from your current legacy CFW back to the official 6.60 base.
Use an authentic Sony Memory Stick Pro Duo or a high-quality MicroSD-to-MS-Pro-Duo adapter.
: You need a Memory Stick with at least 50MB of free space. psp 352 m33 upgrade to 660
If you encounter issues:
standard, you generally need to transition through the Official Firmware (OFW) first. This provides a stable base for installing newer custom firmware (CFW) like 6.60 PRO-C Phase 1: Update to Official Firmware 6.60 Before installing modern CFW, you must move from
: If you see a "Version 9.90" error, it means your current CFW's version number has been faked to prevent accidental updates. To fix this, use a file manager on your PC to navigate to the seplugins folder on your Memory Stick, open version.txt , and change the value from 9.90 to your actual current version (e.g., 5.00 ). Save the file, then try the update again.
Connect your PSP to your PC. Move that entire UPDATE folder into your PSP/GAME/ directory. Run the 5.00 M33 installer from your PSP XMB. If you encounter issues: standard, you generally need
If you have a PSP 1000 or an early PSP 2000 (TA-085v1 motherboard), you technically have a "Pandora Battery" capable motherboard. However, software updates are safer now.
The path from 3.52 M33 to 6.60 isn't always a straight line. Because the firmware is so old, modern updaters may throw errors if you try to jump directly. Step 1: Prepare Your Hardware