Disclaimer: Modifying your PSP firmware carries inherent risks. While this guide provides a safe path, you assume all responsibility for your device. Always back up your saves before starting.

If you tell me your exact PSP model (1000/2000/3000/PSPgo) and whether you prefer a permanent CFW or a safer reversible install, I can give a model-specific download checklist and the exact folder layout to copy.

You should now see:

. Because 3.52 M33 is a very old "M33" era firmware, a direct jump to official 6.60 sometimes triggers the infamous "DADADADA" error , which prevents the update.