You are correct and that is something that we will address in future within our help files.

The dynamic unit is a single drive or multiple drives, which can be used as a
removable backup device or from a RAID set or an iSCSI Target available
within our built initiator to create a Dynamic unit from the Volume Group.

This gives you the option to write a local backup to this
unit in a secure place and have the ability to remove it and re-insert it for later usage.

Using a hard drive as a backup media, provides you huge capacity
for a very low price and also provides fast access to the backup.

Additionally this provides VTL capabilities, so it is used only for backup functions within our backup feature available in DSS and NAS-R3.