The game requires roughly 100 GB of storage and mandatory sign-in to a free Microsoft/Xbox Live account. Steam-Specific Performance & Compatibility Forza Horizon 4 & 5 FFB Configuration - MOZA Racing
Unlike many "Xbox Play Anywhere" titles, the Steam version does not support cross-progression with the Windows Store or Xbox versions. Progress made on one platform will not carry over to the other. Forza Horizon 4 [STEAM VERSION]
It arrived on Steam on March 9, 2021, nearly three years after its initial debut on Xbox and the Windows Store. The game requires roughly 100 GB of storage