C: drive all temporary files like currently downloaded movies & music and default path files.If lost no worries.
D: Personal, Educational PDFs, Video tutorials and projects.
E: drive for videos, music and games data files.
D&E drives rsync with Google storage buckets. (GSUTIL)
Housekeeping - PDFs and Tutorial videos which I haven't referenced in 2years will be eventually deleted. On first identification I will rename the folder as CBD - Foldername(cbd - can be deleted). Next time when I am browsing files in explorer if a CBD catches my eye, I will delete it. I Regularly run dir /s and save output in TXT file for reference purposes, only one time I opened it. Decided not to rename any downloaded files as using the same name it can be found again by googling, if I rename it it's hard to find in internet. I also use a duplicate finder to find and delete duplicate files.
Project files are in google source repository and partially in GitHub & bitbucket as well.
For references links, Have a set of files named it on the subject like java.txt, git.txt, gcp.txt which contains all the commands and links which I had found useful and I am typing it regularly in marked down format itself, so it looks fancy in vscode. This reference is in D:\