Oggyo That's why I wrote "backup/sync". ;-)
Never ever see those two as even remotely similar. It will ruin your life (or at least your mood 😛) as soon as you actuallly need your backup. Consider what would happen to your "synced copy" if you were the victim of a ransomware attack.
That said, you could of course sync to a second location and then set up a backup schedule for that second location.
But OP asked for a backup feature, not sync.