Provides an additional 8TB of usable capacity, requires subscription licenses (WDYXK-ALYS-HxxA) to enable the software. Order quantity one or two to increase physical system capacity from 8TB to 16TB, 11TB to 19TB, 16TB to 24TB, or 19TB to 27TB. Two of these 8TB physical capacity expansions must be ordered before any 18TB physical capacity expansions are added. Includes customer installable hardware license and/or six 4TB drives. Customer installable but optional phone-based installation (SDY48-NSYS-PB00) or onsite installation (SDY48-NSYS-000x) are also available. If Atempo Tina is licensed for use with the DXi system, when DXi capacity is added, additional Atempo Tina capacity must be purchased to match the DXi capacity.