Synology 4TB RS411. Total storage capacity: 4000 GB, RAID levels: 0, 1, 5, 10, Hard drive interface: Serial ATA II. Memory type: DDR3, Internal memory: 256 MB. Processor clock speed: 1600 MHz. Supported network protocols: AFP, FTP, Networking features: Gigabit Ethernet, Cabling technology: 10/100/1000BASE-T(X). Management protocols: SNMP