WD Red Plus NAS Hard Drive WD40EFZX, 4TB, Internal, 3.5, SATA 6Gb/s, 5400 rpm

WD Red™ Plus NAS Hard Drive

Tackle demanding NAS workloads with WD Red™ Plus, purpose-built for small to medium business and SOHO NAS environments. Designed for archiving, sharing, and RAID array rebuilding on systems using ZFS and other file systems, WD Red™ Plus gives you the flexibility, versatility, and confidence to store and share your important home and work files.

Optimized for Small and Medium Businesses

Stream, back up, share, and organize your digital content with WD Red™ Plus drives in your NAS:

• Ideal for small to medium business and SOHO NAS environments
• Designed to handle increased workloads¹
• Built and tested for use in up to 8-bay NAS systems
• Effortlessly share content across devices at home or in the office

For larger businesses with NAS systems up to 24 bays, WD Red™ Pro drives deliver exceptional performance.

Exclusive NASware™ 3.0 Technology

Not all drives are created equal. WD Red™ Plus features Western Digital’s exclusive NASware™ 3.0 technology:

• Get up to 112 TB of capacity in your 8-bay NAS system
• NASware™ 3.0 is built into every WD Red™ Plus hard drive
• Advanced technology helps improve storage performance
• Increases compatibility, integration, upgradeability, and reliability

Built for Optimum NAS Compatibility

WD Red™ Plus with NASware™ technology takes the guesswork out of choosing a NAS drive:

• Optimized specifically for NAS and RAID environments
• Unique algorithm balances performance and reliability
• Among the most compatible drives available for NAS enclosures
• Reflects extensive NAS partner engagement and compatibility testing

WD Red™ Pro for Bigger Demands

For heavier workloads and larger NAS environments:

• WD Red™ Pro is designed for medium to large business customers
• Ideal for NAS systems with 9 to 24 bays
• Delivers heavy-duty, uncompromising performance
• Backed by a 5-year limited warranty

3D Active Balance Plus

WD’s enhanced dual-plane balance control technology helps improve drive performance and reliability:

• Significantly improves overall drive performance
• Helps reduce excessive vibration and noise in multi-drive systems
• Helps minimize issues that can reduce hard drive lifespan and degrade performance over time

Engineered for 24/7 NAS Environments

Because your NAS is always on, drive reliability is critical:

• Designed for 24x7 NAS operation
• MTBF of up to 1 million hours

Why Choose WD Red™ Plus Over Desktop Drives

Do right by your NAS with a drive purpose-built for network storage:

Compatibility
- Specifically tested for NAS compatibility
- Helps deliver optimum performance in NAS systems

Reliability
- Designed and tested for the always-on, high-temperature NAS and RAID environment
- Desktop drives are not typically tested under these demanding conditions

Error Recovery Controls
- WD Red™ Plus NAS drives feature RAID error recovery control
- Helps reduce failures within the NAS system

Noise and Vibration Protection
- Engineered to thrive in multi-bay NAS environments
- Desktop drives, built to operate solo, typically offer little or no protection from multi-drive noise and vibration

¹ Increased workloads as referenced for small- to medium-sized business NAS environments and SOHO customers.