This became the community standard in later years. It offers the same features as ME but often with a slightly different update procedure.
Upgrading your Sony PlayStation Portable (PSP) from older custom firmware like 3.52 M33 to the modern standard of 6.60 (or higher) is a crucial step for compatibility with newer games, homebrew applications, and improved system stability. If you have been running a classic fat (PSP-1000) or slim (PSP-2000) with 3.52 M33, your console is likely a candidate for a permanent hack upgrade.
Before downloading files or transferring data, ensure your system meets these safety baselines:
Upgrading to (the final official firmware revision) is the best way to modernize your console. Here is the breakdown of why and how to do it.
Go to Settings > System Settings > Format Memory Stick . (Warning: This deletes everything on your card!) USB Connection: Connect your PSP to your PC using USB. Phase 2: Upgrading to Official Firmware 6.60
It wasn't all polish. M33 kept its foxholes: an experimental corner where the filesystem still hummed with oddities, where unsigned code could be coaxed to sing. 660 brought a discipline to those corners — a promise that chaos could be tamed without killing it. Developers found their tools less combative; players found odd games that had crashed before now finished their stories.
Follow the instructions to flash the firmware. Once completed, press Cross (X) or Circle (O) to shut down or restart the console. Your system software will now read . Step 3: Upgrading to Official Firmware 6.60
Your PSP must be charged to at least 78% . Connecting to a power source during the update is highly recommended to prevent a "power-off brick".
Before flashing, you must prepare your PSP to handle the new files. Take out any UMD disc.
Navigate to PSP/GAME/ and clear out any old folders inside it. Create a fresh folder named UPDATE .
The latest versions of plugins like HUD, custom sorting, and game patches require a 6.xx baseline.
You are currently on firmware 3.52 M33, which is part of the "Old School" era (circa 2007). Modern homebrew, plugins, and ISO loaders require modern firmware. The current standard is version 6.60.
Check system information: it should now show "System Software 6.60" (no custom suffix).
Older CFWs like 3.52 M33 contain anti-update protection that prevents direct installation of newer official firmware (OFW). Bypassing this requires a specific upgrade path to avoid triggering Sony's safeguards that could brick your device. The key steps are:
Follow the on-screen instructions to flash the permanent patch. Note: If you have a Go to product viewer dialog for this item. Go to product viewer dialog for this item.
Your PSP battery must be charged to at least 78% . The system will block firmware updates if the battery is low. Keep the AC adapter plugged in throughout the entire process.
