WD Red 4TB 3.5 Inch NAS Internal Hard Drive 5400 RPM WD40EFAX

Specifically designed for use in NAS systems with up to 8 bays Supports up to 180 TB/yr workload rate* |Workload Rate is annualized (TB transferred times (8760/recorded power-on hours)), workload rate will vary depending on your hardware and software components and configurations NASware firmware for compatibility Small and home office NAS systems in a 24/7 environment. 3-year manufacturer's limited warranty Note: The always-on environment of a NAS or RAID is a hot one, and desktop drives aren’t typically designed and tested under those conditions like WD Red