PvP_LostKnight of acidmods.com created this amazing mod in PSP. He able to fit a 30GB hard drive into a PSP and its connected to PSP thru USB cable and his using the IRShell Apps by Ahmad to run the most of his Homebrew Apps. So if you’re willing to sacrifice access to the UMD drive to a more internal storage amounting of 30GB or up to 1TB maybe, apparently there is no limit so it’s not impossible. Nothing is impossible in PSP Community. I can’t wait for the Tutorial to be released.

BTW attempting this kind of mod are may cause damages to your unit.

Source: Acidmods.com