Intel Entry Storage System 4-Bay Network Attached Storage Enclosure SS4200E Flexible Network Attached Storage (NAS) solution that instantly adds storage capacity for small business and home networks. Includes 4 USB 2.0 ports and 2 eSATA ports; Intel Celeron Processor 420 running at 1.6 GHz Supports up to up to 4 3.5-inch SATA hard disks for up to 3 TB of secure storage EMC Retrospect backup software; out-of-box RAID 3-year limited warranty