http://4l2dgddgsrkf2ous66i6seeyi6etzfgrue332grh2n7madpwopotugyd.onion/watch?v=J2QP4onqJKI
This video goes over BTRFS in-depth, and in this guide, you will learn basic commands, structure, snapshots, and raid capabilities. BTRFS Article for Reference: https://www.christitus.com/btrfs