WD Red Plus WD40EFPX 4 TB Hard Drive - 3.5" Internal - SATA (SATA/600) - Conventional Magnetic Recording (CMR) Method WD40EFPX

Tackle Intensity with WD Red® Plus

Packed with power to handle NAS environments in home offices up to medium-sized businesses, WD Red Plus is ideal for helping protect, archive, and share valuable data in NAS systems with up to 8 bays. WD Red Plus NAS drives give you the flexibility, versatility, and confidence you need for your important home and work files.

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 warranty.

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.

3D Active Balance Plus

Our enhanced dual-plane balance control technology significantly improves the overall drive performance and reliability. Hard drives that are not properly balanced may cause excessive vibration and noise in a multi-drive system, reduce the hard drive life span, and degrade the performance over time.

Thrives in 24/7 Environments

Since your NAS system is always on, a reliable drive is essential. With an MTBF of up to 1 million hours3, the WD Red® Plus drive is engineered to tackle 24/7 environments.

Premium Support and a 3-year Limited Warranty

Confidently upgrade your NAS performance with the assurance of a 3-year limited warranty, coupled with world-class support services included with every WD Red® Plus drive.

• 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
• Built for small or medium business NAS systems in a 24/7 environment
• 3-year limited warranty