QNAP Turbo NAS TS-259 Pro Network Storage Server - Intel Atom D510 1.66 GHz - RJ-45 Network, USB, eSATA, VGA. The TS-259 Pro is the powerful 2-bay network attached storage (NAS ) server, which is designed to provide an affordable and easy-to-management solution with iSCSI service for virtualized and clustered environment. The TS-259 Pro also offers versatile business applications to maximize the efficiency of the data center in the business environment.