Full Yunohost server backup in DVD or similar support

Is there a way to do a full system backup in a reliable support, maybe inexpensive pendrives or dvdr, any solution for this?

Yes :

  1. create a backup with yunohost backup create (or equivalent through webadmin)
  2. the archive will be located in /home/yunohost.backup/archives/
  3. copy the archive wherever you want (using CLI)