Yes, you can switch where to download games in Origin. Follow the steps outlined below:
1. Open up your Origin Client
2. Click on "Origin" in the top-left
3. Click on "Application Settings..."
4. On the left side, click "Advanced"
5. Under the section "Downloaded Games" at the top, click "Change..."
6. Click on "This PC" on the left of the pop-up
7. Click on the drive you want to download to (D: in your case)
8. Right-click in the open area, go to "New" and select "Folder". Name the folder "Origin Games"
9. Highlight the new folder and press "Select Folder"
10. You will get a pop-up notification that your destination has changed, and new downloads will be installed there. Just click "Close"
11. Boom...Done
