Important stuff (about 150G) is synced to all my machines and a b2 Backblaze bucket.
I have a rented seed box for those low seeder torrents.
The stuff I can download again is only on a mirrored lvm pool with an lvmcache. I don't have any redundancy for my monerod data which is on an nvme.
I'm moving towards an immutable OS with 30 days of snapshots. While not the main reason, it does push one to practicing better sync habits.