Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5'' - WD40EFRX

Available in capacities ranging from 1-14TB with support for up to 8 bays 5400RPM performance class Supports up to 180 TB/yr workload ratex| x Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred ✕ (8760 / recorded power-on hours)) NASware firmware for compatibility Small or medium business NAS systems in a 24x7 environment 3-year limited warranty