Agreed, some sort of mirror, raid or zfs. Sure a raid is not a backup, but it'd certainly better to resync a new drive than to have to figure out everyth9ng that was on the drive and start downloading them all again. Assuming the original posts or torrents Eben still exist.
Important files and Docker configs have a copy on Google Drive also, and everything else is ultimately unimportant and can be recovered (yarr). GDrive and the local drive are copies of each other for what would actually be a pain to lose. I'm avoiding a full thorough NAS machine setup because I already get weird looks for the basics I have now!