For a long time, the PS5 was an "unbreakable fortress". Unlike the PS4, which had a well-established system for —files modified to bypass license checks—the PS5's security was much tighter. The "story" of PKG games on PS5 is one of evolution:
This is the most popular method for large libraries, as PS5 games are huge (often 100GB+). ps5 pkg games
This involves putting the game files on a USB drive and plugging it into the PS5. For a long time, the PS5 was an "unbreakable fortress"