How do I change the default Save Location in Dorico?

So, in my new laptop, I have 2 Drives, I need the Files to default saving into my 2nd Drive, or D Drive, instead of the C Drive. I am trying to Get Dorico to put all the backups and auto save on the D:Drive. The C:Drive only has room for the Operating System on my computer. How do I do that?

Dorico keeps putting all back up projects in the C:Drive, which I do not want.

From the Edit menu, choose Preferences|General|Files.

You should see the options you want.