The new Xbox Series consoles will start shipping to fans next week on November 10. However, one lucky redditor got their Series S console early and confirmed that there is a significant chunk of storage dedicated to system functions. The Xbox Series S has a 512GB SSD built in, of which 364GB are available for game installations. Similarly, the Series X console has a 1TB SSD, of which 802GB are available. So that’s about 30% of memory reserved on the S and 20% on the X. This reserved storage is for the OS as well as the Quick Resume feature, which needs to store gigabytes of game...
Source: https://www.gsmarena.com/the_xbox_series_s_has_364_gb_available_for_games_the_rest_of_the_512_gb_ssd_is_reserved-news-46129.php