Backup
guest@6admin.io:~$ ls ~/tags/backup
A Backup Without a Restore Test Is Decoration
You don't know whether your backup works until you've restored it. The git clone as a free backup, multiple remotes, Restic/Borg/rclone for the rest and why Btrfs/ZFS snapshots are not backups.
SSH: secure rsync
Rsync over SSH, incremental backup on the encrypted channel.