The feature will need to be supported by the game in question.
Storage space is always something that console players need to keep juggling, especially as sizes of games get larger and larger by the day. The Xbox Series X is going to launch with a 1 TB SSD, of which 802 GB will be usable. But Microsoft are implementing some interesting features that will optimize storage management as well.
Recently, in a podcast while speaking with Microsoft’s Larry “Major Nelson” Hryb, Xbox’s director of program management Jason Ronald talked about one such feature, which will allow Xbox Series X and Series S games to be partially uninstalled. For games that support this feature, players will be able to select particular sections to uninstall, so if you’re only playing the multiplayer component, you can go ahead and uninstall the campaign.
It will be up to the developers whether or not they support this feature and offer it to players, but it would be very useful to have- especially on an Xbox Series S, which only has 512 GB of internal storage, all of it obviously won’t be usable.
Microsoft have also said that the Xbox Series S implements technology that allows developers to decrease the sizes of their games, should they wish to. Read more on that through here.