Does anyone know if you've got an Xbox one game on a USB hard drive, and you transfer it to the internal storage, does it get "automatically optimised" for series X or is a fresh install of the game required?
Eventually you get a game update notification, some games are large patches, others are a complete reinstall.
I moved Halo MCC from my previously unplugged external drive to internal last night, the update only triggered when I started the game. It was a 40gb update, the game was around 100gb before updating.