You have the correct idea. Previously I used XFS. Shure for torrent storage I use loop with btrfs. For USB fat32... for old hardware and OS'es. I forgot what Hammer (Dragon Fly bsd) is used for or if I ever use it (I gave up on DragonFly because of ransom crap attention). Just make sure you have hardware disk encryption (all motherboard manufacturers have it but don't give it with default BIOS) to prevent watermarking.