Here's what I'd do.
First, buy a new, smaller HD for the System drive. 1TB is overkill, as you don't want anything on that drive but the OS and Programs.
C: 256GB - OS/Programs
D: 1TB - Projects/Scratch (including music and image files in a project folder)
E: 1TB - Media (nothing but the captured video files)
F: 1TB - Exports
G: 1TB - Archive (Project folders from D, but not including the video, which can always be recaptured if need be.)
This will spread the load out fairly well.
It looks like I'd be best to re-jig a bit along the lines I mentioned (although my primary work is editing, I do use the PC for Photoshop, Illustrator, Dreamweaver, etc. projects as well). When you say "Exports", are you talking finished movies?
Exports, meaning anything "exported" out of PP or AE, whether it's finished or not.
YOu mean "renders?" A render disk. And d e and g should be at least RAID 1
Not really. Typically "render" means creating a new file for use within PP. They're called preview or scratch files.
Export mean going out of PP as a new video or audio file.