Running 5.50 GEN-D3 today means you are locked out of the last three years of official Sony updates, modern homebrew ports (like DaedalusX64 or RetroArch), and many plugins. The golden standard today is or 6.61 LME-2.3 installed via Infinity 2.0 .
The first step is to download the 6.61 firmware package from a reputable source. Make sure you download the correct package for your PSP model and region. psp 5.50 gen d3 to 6.61
: Plug your PSP into your computer via USB. A drive will appear representing the internal flash memory. Running 5