SiSTRO and Xvortex have released PS4 PKG2USB, a tool for the PS4 that allows owners of a hacked console to run their games from and external hard drive. The tool is compatible with both 4.05 and 4.55 consoles.
This is a PS4 payload (based on Vortex’s dumper) to dump and run fake PKGs on USB.
USB drive must be formatted to exFAT
works only with fpkg (not official pkg)
game/app have to be before installed as usually on internal storage
copy ps4-pkg2usb.cfg to usb root
edit config title_id with game/app title_id
always use the same USB port that when you installed game
to reinstall game to internal hdd, remove and reinstall as usual