Are you installing this for , Mario Kart 8 , or a different game? Knowing the specific game helps with the exact folder path!
: Ensure all .rar files have the exact same name except for the part number and are in the same folder. Download its Bollito rar
Find where your game is installed. For Steam games, right-click the game in your library > > Browse local files . Are you installing this for , Mario Kart