WD Red Plus 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 128MB Cache, 3.5 Inch

Available in capacities ranging from 1-14TB with support for up to 8 bays
Supports up to 180 TB/yr workload rate
NASware firmware for compatibility
Small or medium business NAS systems in a 24x7 environment
3-year limited warranty