A tool for backing up your data using rsync
https://rsnapshot.org/

  rsnapshot is a filesystem snapshot utility based on rsync. rsnapshot makes
  it easy to make periodic snapshots of local machines, and remote machines
  over ssh. The code makes extensive use of hard links whenever possible, to
  greatly reduce the disk space required.

  The SailfishOS Chum package includes example configs and systemd timer units
  to run it periodically. For them to work you must create a valid config file in
  ~/.config/rsnapshot/rsnapshot.conf and enable the .timer units.