Ensure you have all parts in the same folder (e.g., part01.rar through partXX.rar ).
Right-click on Forza.Horizon.5.part01.rar and select "Extract Here" or "Extract to Forza Horizon 5/" . Forza.Horizon.5.part07.rar
To help you get the game running, here are the standard steps for handling multi-part RAR files: Ensure you have all parts in the same folder (e
Multi-part archives work like a puzzle; you cannot extract the game if even one piece is missing. Forza.Horizon.5.part07.rar