The QNAP REXP-1200U-RP expansion enclosure is designed for expanding the storage space on the Turbo NAS & can support maximum 384 TB raw capacity by connecting multiple expansion enclosures via high-speed mini SAS cables. This is especially useful for large data applications, such as video surveillance, data archiving, & TV broadcast storage. The REXP-1200U-RP supports 12 hard drives & 48 TB raw capacity in 2U rack space. The REXP-1200U-RP has two SAS wide ports (in port & out port) for host connectivity & daisy-chain respectively. Each SAS wide port combines four SAS channels. The solution delivers unprecedented performance of up to 24 Gbps per host connection.