thank you for your reply . the requirement is for Backup of Files/Data . this would be predominantly only NAS files/Folders created at the branch locations .
Replication of the NAS data would be useful as it would give the exact copy for restore incase of any failure at the branch level NAS appliance .
the data would be of end users , so each user would be accessing his own files/folders on the NAS at the branch location . so it would be beneficial if the solution can provide incremental backup or replication of file/folders on the central device which we plan to power by open-e DSS7 .
do let me know if this scenario should be possible .