Yeah, I'm doing 3-2-1 as well, though my off-site backups (two) only cover essential data, not my movie collection or anything else 'expendable'. I have 2x 10TB WD Red Pros alongside 2x 4TB WD Reds (they would now be Pros, before the name change). For the 10TBs I use daily-or-more snapshots, local full backup once a month that I disconnect physically (mitigate chance of ransomware attacks), and daily off-site. Along with raid1 (not a backup yada yada). So I'd need two drive failures, plus the external drive to fail, plus both off-sites to fail (different companies, different continents). I still want to get another local drive, backup to it say every 6 months, so if the 3 local disks all simultaneously die, I still have a chance with #4. 'soon'. This year hopefully.

But regardless, I'm going to dread when one of them alerts me. Prepare for the worst, hope for the best.

(the 4TBs don't get backed up beyond snapshots as it's just ota dvr recordings and backup drives for another system)

Its itneresting how there's so little information on a page for a product that's so expensive.