NETGEAR ReadyNAS Rackmount Network Attached Storage with 4x2TB Desktop Drives (RN31842D) Premium performance 4-Bay, quad core, Rackmount storage and backup for SMBs (NAS and SAN) Easy local setup, monitoring and management through the NETGEAR Insight app for iOS and Android (with ReadyNAS OS 6.x) Unrivaled 5 Levels of Data Protection  XRAID; Snapshot; built-in anti-virus; Bitrot protection; and cloud backup Unlimited snapshots, thin provisioning, virtualization and all-inclusive disaster recovery with ReadyDR (no additional backup license required) 5-YEAR hardware warranty with Next Business Day replacement and unlimited technical chat support, 90 days of technical phone support