Do I need dlc disk?

Long story short I want to have ffxiv installed on my ps5 (well when it arrives lol) but it looks like I can't just copy it via external from my ps4 only move it and I want to keep it on both.

So it looks like I will need to install it again, originally I started with the digital version of realm reborn, however I purchased heavensward on disk the rest of the expansions are digital, will I need to use the heavensward disk while installing/downloading the game to the ps5? Or will everything just come down as one anyway as the licences are already attached to my account.

Not 100% sure but I believe as all expansions are linked to your account you just need to download the game client and it will include everything you need.