Generic NAS 1.6GHz/512MB Network Storage F2-NAS2 Cloud Storage 2 Bays NAS Server RAID Storage All-Aluminum Built Case for Small Business and Home (Diskless) NAS with RAID array requires high stability. Only WD RED HDD & SEAGATE NAS HDD are recommended! Supports a 4TB x 2 capacity hard disks configuration. Powerful hardware with 1.6GHz CPU, 512MB DDR, Gigabit Ethernet. The Operation System is a smart, simple OS with user-friendly interface. Offers exclusive client software  Tcloud, a convenient tool to search and connect.