The QNAP REXP-1000 Pro expansion enclosure is designed for expanding the storage space on the Turbo NAS & can support maximum 250TB 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. Plug & use, seamless capacity expansion Simply connect a REXP-1000 Pro to a Turbo NAS* & power it on. The Turbo NAS will detect the hard drives in the REXP-1000 Pro as newly installed local drives. The Turbo NAS capacity can be expanded seamlessly by using the powerful QTS Storage Manager. Missing mode protection When disconnection of the expansion enclosures occurs, the Turbo NAS enters missing mode automatically & blocks I/O access to protect the stored data. The system can then recover from the missing mode to the normal state with data staying intact when the disconnection is resolved. High density, high efficiency & highly scalable The REXP-1000 Pro supports 10 hard drives & 50TB raw capacity, & has two SAS wide ports (IN port & OUT port) for host connectivity & daisy-chain respectively. Each SAS wide port combines four SAS channels (maximum 8 SAS channels supported per expansion enclosure). The solution delivers unprecedented performance of up to 24 Gbps per host connection.