I haven't played the game in a while but recently came back to it. I've heard about a ps5 add on manager, but im not really sure how it works. Anyone know?
There is nothing you have to do on your end for it to work, it is automatic as it is a part of the game.
It loads/unloads content based on what route you are playing to bypass the 64gb limit that was set by Sony. Only loads what is necessary rather than everything. Nothing you have to do on your end.