I use a similar, but I think simpler, setup. "Files I use and change every day" are on Dropbox, which gets synced to a NAS. Photo and video files are directly

I use a similar, but I think simpler, setup. "Files I use and change every day" are on Dropbox, which gets synced to a NAS. Photo and video files are directly stored on the NAS and don't live anywhere else. The NAS is rsynced automatically every day to an external disk (connected via USB) of which there are three copies. One is in a safe at home, the other at my parents' house. The one in the safe is rotated every week, the one at my parents' every month. If my house gets robbed or even burns down it's likely the disk in the safe will survive and I lose only one week of data. If the house gets completely destroyed or the safe is cracked, then I can turn to the disk at my parents and lose one month. It's true that rsync is not a backup. But by default rsync only adds data. Delete is an option one has to turn on. My daily rsync does not have the delete option. I have a different script with delete, that I run manually. The theory was that I would review the delete process with a dry run before committing to it. In practice I don't do this and simply run the delete script occasionally, which ruins the purpose. But I guess I could be more careful if I really wanted to.