Hello!
You would have to completely relocate your Documents folder first before moving your ETS2 Folder
if you would like to move your docuents folder, follow the instructions below:
1. Right-click the My Documents or Documents folder. Select Properties.
2. Click the Location tab.
3. Click the Move button.
4. In the resulting dialog box, go to your name folder in drive D:, create a new folder inside it called documents, and select that.
5. After you click OK, click Yes to move your files.
6. Then wait. The actual move may take a while.
If this does not work for you, feel free to message me for more help
Kind Regards
David C.