neowin[.]net/news/the-new-microsoft-store-app-update-lets-users-pick-where-to-store-their-downloaded-games/
Customize the install location of your games: When downloading games like Starfield, Halo Infinite, or Forza Motorsport, you will now be able to specify the installation drive. For example, when clicking the install button from Starfield’s page, you’ll be greeted with a new dialog providing you a chance to select a drive. You can change your default drive from the Microsoft Store’s settings page. Also in the settings page, you can specify the folder location of your games within that drive. These settings are synchronized with the Xbox app on PC to ensure a consistent gaming experience.