Sign in to your existing account on your PS5 console (or create an account).
Insert the eligible PS4 game disc.
Go to the game hub for the PS4 game.
Select the upgrade offer on the game hub and review the upgrade offer.
Select Download (or purchase with the discount price) to download/purchase content.
After the download is complete, you can play the PS5 digital game by inserting the PS4 game disc. You will need to keep the disc inserted each time to play the game.
Upgrade to Xbox Series X|S
Insert disc and Series X|S stub will automatically be installed.
User will be prompted that the game needs an update.
Once the update process completes, the game can be launched.