QNAP TS-859U-RP/4TB. Total storage capacity: 4000 GB, RAID levels: 0, 1, 5, 6, JBOD, Hard drive interface: Serial ATA, Serial ATA II. Memory type: DDRII, Internal memory: 1024 MB, Flash memory: 512 MB. Processor family: Intel Atom, Processor model: D510, Processor clock speed: 1660 MHz. Supported network protocols: CIFS/ SMB, AFP(3.1), NFS, FTP, HTTP, HTTPS, Telnet, SSH, iSCSI, SNMP, Networking features: Gigabit Ethernet, Cabling technology: 1000BASE-TX. Security algorithms supported: AES 256-bit