Western Digital 4TB 3.5 Inch Red Internal NAS Hard Drive with 5400 RPM, SATA 6gbit/s, NASware Technology, 256 MB Cache, Red

Western Digital WD Red 4TB NAS Internal Hard Drive - 5400 RPM Class SATA 6 Gb/s 256 MB Cache 3.5" - WD40EFAX 4TB WD40EFAX Highlights: Specifically designed for use in NAS systems with up to 8 bays Supports up to 180 TB/yr. workload rate is defined as amount of user data transferred to or from drive. Workload Rate is annualized (TB transferred times (8760/recorded power-on hrs.)). Workload Rate will vary on hardware/software components NASware firmware for compatibility Small and home office NAS systems in a 24/7 environment 3-year manufacturer's limited Note: Make sure that this fits by entering your model number.