Niveo Professional NNAS-R4 - Manual (Page 161)

NAS System
User Manual 161
3.5 Data Backup
The administrator can backup NAS data to remote destination or to local disk drive.
NOTE: The Data Backup function is not available in the iSCSI target
Volume. Only share folders (created under non-iSCSI Volume) can be
included in the backup source. iSCSI Volume cannot be selected as
backup source.
3.5.1 Backup List