Not really, as the backup normally contains your whole NethServer files and config.
That would be like saving your Windows C: Disk on your C: Disk. If that disk crashes, so did your Backup!
I do “normal” backups for the server, for all cases and disaster recovery.
For my clients and users, I provide a weeks storage of read-only backups.
I map this Backup Folder on the Windows Clients as Drive Y:.
Due to the size, this is usually on a NAS, and NOT on the server itself!
All clients can dive into Y:, and there they will see 8 subfolders, labeled as follows:
The stff in those folders is rsynched every night to the specific folder, and is visible as read-only to the users. They can copy a file (any one, or several) from here and put it back into their normal storage drive, if they made a boo-boo and realized it themself and they can also solve it - without me!
This Backup-Folder is strictly read-only, as an additional protection against Ransomware Cryptolockers.
The Users PC has write access to their normal storage, those files will be encrypted. But not these backup files!
My 2 cents