Iomega StorCenter Pro NAS 300r Series - 500 GB, with Print Server. Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: Serial ATA. Internal memory: 512 MB. Processor model: Celeron, Processor clock speed: 2800 MHz. Supported network protocols: TCP/IP, IPX, NetBEUI, AppleTalk. Bundled software: Iomega Automatic Backup Pro v3.1 CA e Trust Antivirus for Windows v7.1