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My day-to-day stuff stays in sync via syncthing on my two laptops, my desktop and my home server. They all run btrfs, so I won’t be syncing any flipped bits around.
Home server rsyncs from my VPS once a week. When that’s fine, it rsyncs itself over to a hetzner storage over sshfs+gocryptfs.
Four copies at home, one in the cloud.
Get your own domain. Don’t host your own.
I’ve had the same domain on gmail, proton and now purelymail.