We do recommend having a 3-2-1 backup (3 total copies, 2 local (1 original, 1 local external), and 1 offsite (where Backblaze comes in). In Tedivm's defense though, he did find an actual glitch in our UI that occurred in edge cases, and we've since fixed it. The unfortunate part is that he lost data when we no longer had a copy, and we're actively working on additional ways to avoid that in the future.