Ensure you have enough space for the extracted files (typically 7GB+ depending on DLCs included).

If this archive is for a specific mod (like ProMods or a truck skin pack), the installation process may involve moving the extracted .scs files into your Documents/American Truck Simulator/mod folder. To help you further, could you tell me: Is this the base game or a specific map/truck mod ? Did you run into any errors while trying to extract it?

Right-click on Part 1 and select "Extract Here" (using WinRAR or 7-Zip). The software will automatically pull data from the subsequent parts to reconstruct the full installer or game folder. Key Features of the Game

The file name indicates that this is the first segment of a three-part compressed archive.

Manage your own business, hire drivers, buy garages, and customize your fleet to maximize profits.