How do you backup your NAS? Cloud service, remote server at friends house or something else?

Hey everyone,

first of all... im new to everything regarding NAS.

I just setup my first sync job within UGOS and am positivly suprised how easy that was. I also just recently learned the difference between a sync and a backup. My plan is to sync all my personal data to my NAS and let the NAS do a backup once a day or so to a remote server.

What are you using as a remote server that supports rsync? Do I need to purchase a second NAS for this or are there any good cloud services for backups?