Before getting overly excited, this is some Before getting overly excited, this is some PKG2USB Feedback by Stooged for those considering giving it a try.

Spoiler

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

Following the App.pkg Database Mod PS4 4.55 Update Blocker HEN and recent PS4HEN VTX release, PlayStation 4 developer @CelesteBlue made available via Twitter PS4to dump and run Fake PKGs on USB with both 4.05 / 4.55 Payloads byDownload: PS4 PKG2USB (Latest Release) Available on the latest release page are aconfiguration file,andpayloads.Here's a brief usage guide from e✘treme-Modding.de , to quote roughly translated:Today we present you PKG2USB, a Payload (based on Vortex’s Dumper) to dump and run Fake PKGs on USB.1) works only with fpkg2) game/app must be before installed as usally on internal3) copy ps4-pkg2usb.cfg to usb root4) edit config title_id with game/app title_id5) always use the same usb port when you installed game6) to reinstall game to internal hdd, remove and reinstall as usaltip: if you still have the pkg and you want to avoid wasting time waiting for the file to be copied from the payload on the usb HDD, copy the pkg to X:\PS4\CUSAxxxxx\app.pkgDownload: ps4-pkg2usb_v1.0.7z (7.4 KB)Coded by SiSTRo – Credits to XVortex & AnonymousThanks for the payload, have tested it on 4.05 and it works perfect. Keep in mind that the app.pkg must be on internal hdd, so it’s similar to my Database Mod but with this payload you don’t have to edit the app.db anymore. Great work !And from the README.md , to quote:This is a PS4 payload (based on Vortex's dumper) to dump and run fake PKGs on USB.Tip: If you still have the pkg and you want to avoid wasting time waiting for the file to be copied from the payload on the USB HDD, copy the pkg to X:\PS4\CUSAxxxxx\app.pkgExternal USB drive storage for 4.05 and 4.55 PS4 homebrews and games is now a thing ! exFAT drive is way easiest to manage, no encryption, so maybe faster than native USB, and works also on 4.05 !!! Credits go to SiSTRO and xvortex and anonymous. (not me)I recall that I didn't do anything in this project except releasing it. I host source code so people will improve it.Cheers to everyone who shared the news tips in the ongoing PS4 4.55 Holy Grail (PS4HEN) discussion thread earlier on!