Dropbox synced with an empty folder, i.e. deleted everything. I didn't notice for over 30 days which was the cutoff for their historical files. Thus my easy off-site copy which I was previously very attached to effectively deleted everything. I did not go back.
This is a classic lesson that everyone learns called Sync Is Not Backup. Everyone learns it eventually and then writes a blog post on it. It used to be a classic HN meme: https://news.ycombinator.com/item?id=4704086 https://news.ycombinator.com/item?id=27157427 https://news.ycombinator.com/item?id=33008837 And every storage company tells a tale of backup vs sync: https://www.backblaze.com/blog/cloud-backup-vs-cloud-s…
It's essentially the same story as RAID Is Not A Backup.
Like with sync you have redundancy, but Lord Redundancy never said he was also also Count Time.