American Truck Simulator Save Game Location
Windows
American Truck Simulator save games can be found on Windows here:
C:\Users\[user_name]\Documents\American Truck Simulator\profiles\
Steam:
American Truck Simulator save games installed through Steam can be found on Windows here:
C:\Program Files (x86)\Steam\userdata\[user_id]\270880\remote\profiles\[user_id]\save\
Mac
American Truck Simulator save games can be found on Mac here:
~/Library/Application Support/American Truck Simulator/profiles/
Linux
American Truck Simulator save games can be found on Linux (Proton) here:
~/.local/share/American Truck Simulator/profiles/