Synology DS3612xs. Processor clock speed: 3.1 GHz. Maximum capacity: 48 TB, Hard drive interface: Serial ATA II, USB 2.0, Hard drive size: 63.5/88.9 mm (2.5/3.5 "). Internal memory: 2 GB, Internal memory type: DDR3, Maximum internal memory: 6 GB. Supported network protocols: CIFS, AFP, NFS, FTP, WebDAV, iSCSI, Telnet, SSH, SNMP, VPN. Security algorithms supported: HTTPS, SSH, SSL/TLS