Forza Motorsport 7 is the first game in the series that has been built from the groud up for 4K resolution featuring 4K textures. The game runs at native 4K on the Xbox One X with 60 fps proving it to be the most ambitious and technical advanced racer on any platform.
While Forza Motorsport 7 hasn’t been released yet and it won’t be out until October 3rd, the official Microsoft Windows store has listed the download size for the game and it is a gigantic 100 GB. This file size is pretty much in line with other first party Microsoft games that have continued to receive updates on the Xbox One. Halo 5: Guardians was already reaching 80 GB while Gears of War 4 with all updates and DLC is more than 100 GB.
Forza Motorsport 7 will be a Xbox Play Anywhere initiative allowing the user to purchase the game on wither Windows 10 or Xbox One and get the benefit of enjoying it on both platforms without any restriction. The game is now available for pre-orders on the Windows 10 store and Xbox Live. While there is no size listed for the game on Xbox Live, there is no reason to expect the file size to be the same on Xbox One X since it also runs the game at 4K.