Hello! :)
I only have one notebook for both the initial drafts and then the final copy. I don’t have two separate notebooks for the rough drafts and the final drafts.
When I write, I just make my revisions right over the first draft. I cross things out, underline them, scribble things in the margins, add new words or new lines, etc, etc. So it’s like my first draft and final draft blend into one another and become the same thing since I just revise the first draft directly. :)