WD Red Plus 4TB NAS Hard Disk Drive – 5400 RPM Class SATA 6Gb/s, CMR, 258MB Cache, 3.5 Inch – WD40EFPX

For Small or Medium Businesses
WD Red® Plus drives deliver the speed and capacity business customers require to store, protect, and share increasing amounts of data with a growing number of NAS users. For NAS systems with up to 8 bays, WD Red Plus drives deliver uncompromising performance and unwavering assurance backed by a 3-year limited warranty2.

For Home Office and Power Users
Whether you’re a power user looking to store high-resolution videos or running a home office with thousands of electronic documents, WD Red® Plus drives are designed to help you effortlessly organize, protect, and share your digital content.
Exclusive NASware™ 3.0 Technology

Built into every WD Red® Plus hard drive is Western Digital’s exclusive NASware 3.0 technology. NASware 3.0 is advanced technology that improves your NAS system by increasing compatibility, integration, upgradeability, and reliability. WD Red Plus drives with NASware technology take the guesswork out of selecting a drive for your NAS system.

Built for Optimum NAS Compatibility
Optimized for NAS systems, our unique algorithm balances performance and reliability in NAS and RAID environments. Simply put, a WD Red® Plus drive is one of the most compatible drives available for NAS enclosures. But don’t take our word for it. WD Red Plus drives are a reflection of extensive NAS partner technology engagement and compatibility testing.