If your NAS device supports the NDMP protocol, you can back up data from it to tape. For this, you need to utilize the file to tape job.
To back up data from NAS devices by the NDMP protocol, you need to add the device as an NDMP server. For details, see Adding NDMP Servers.
Even if the NAS device supporting NDMP protocol is already added to Veeam Backup & Replication, you need to add the NDMP server as a separate procedure. Otherwise you will not be able to perform file backup to tape.
Requirements for NDMP Servers
NDMP version 4 or higher is supported.
Number of Restore Points
For all NDMP devices, the backup chain stored on tapes will consist of 10 restore points maximum. On the 11th run, Veeam Backup & Replication will force an active full.
Limitations for NDMP Servers
Backup from NDMP clusters is not supported.
Only backup of whole volume is supported.
The NDMP server performs its own backup consistency check for the NDMP volumes. To provide for the correct calculating of the delta of changes and to ensure the backup chain integrity, Veeam Backup & Replication does not allow to add one NDMP volume to more then one file to tape jobs.