Sorting ~10 years of my digital life I've got everything I ever made from 6th grade to today on ~15TB worth of drives (7 in desktop, 30 + 1 in a fibre channel setup I obtained for free) and it is essentially totally unsorted. I have made progress in certain areas, such as getting all music or recorded TV or 3D models I made into folders of their own, but beyond that I always struggle to find stuff. 

For music I can work through it with MusicBrainz Picard and Tag&amp;Rename, but the rest sits in a big clump of "z/old hd/desktop/flash drive backups/desktop2" or similar structure. How do I go about tackling this?