If you do not create a proper backup, installing a new save file will completely overwrite your current career progress. There is generally no way to "merge" a 100% save with your existing profile. You will lose everything you have earned up to that point.
Navigate to: %LOCALAPPDATA%\Packages\Microsoft.624F8B84B80_8wekyb3d8bbwe\SystemAppData\wgs forza horizon 5 pc 100 save game
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. If you do not create a proper backup,