I have actually 5.50 GEN-D3 installied, a very old CFW, but i wanted to install a permanet 6.20 CFW
I am getting the 9.90 issue when try to update to OFW 6.20
All the tutorials include usb connection but i dont have a usb cable, because my psp is very old (PSP 1000)
i bought last year a usb...