It sounds like you’re looking for information on installing on a PS4 , possibly related to game backups, homebrew, or emulation.
Installing PS3 games directly as PKG files on a PS4 is not natively possible ps3 to ps4 pkg install
The dream of dragging a PS3 PKG onto a PS4 and hitting “Install” is just that – a dream. For every success story involving an obscure 100MB PSN game, there are a thousand failures with corrupted data or hard crashes. PS3 package (PKG) files It sounds like you’re
Place your PS3 PKG and RAP files into a folder (commonly named "DEX"). possibly related to game backups