See a graphic view of a drive's contents.

I'd like to see visually how space is taken up on a drive, or among different drives.

Like a pie chart, graphs, etc. Maybe something that I could assign categories to, give them different colors. So that I can see the sizes of different folders (folder A, folder B, folder C), etc. And then also grouped by category- Client files (all the blue folders), Finance files (all the green folders),. etc.