WD Red Plus 2TB NAS 3.5" Internal Hard Drive 5400 RPM Class, SATA 6 Gb/s, CMR, 64MB Cache, 3 Year Warranty

Amazon

Available in capacities ranging from 1-14TB with support for up to 8 bays Supports up to 180 TB/yr workload rate | 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)). Workload Rate will vary depending on your hardware and software components and configurations. NASware firmware for compatibility Small or medium business NAS systems in a 24x7 environment

Zoro Tools

WD Red Plus drives are designed to handle workloads of power users and small to medium business NAS environments. WD Red Plus drives deliver the speed and capacity required to store, protect and share growing amounts of data in mid-sized RAID-optimized NAS systems with increased power efficiency.