I'm overhauling my family's computers and phones this holiday season to align with WIN10. Part of the task is cleaning-up Files, Folders and drives. Examining my media folders - Photos and Videos - I noticed I always have Videos (.mp2, .mp4, .mpx) in my Photo folder. They usually originate from devices (phones). I would like my photos in My Pictures and videos in My Videos - and associated User Folders.

I can find threads on "Association" of File Extensions with Programs... but, I cannot find anything on how to align files and folders?