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WD Red Plus 4TB NAS Hard Disk Drive – 5400 RPM Class SATA 6Gb/s, CMR, 64MB Cache, 3.5 Inch – WD40EFRX

**WD Red Plus 4TB NAS HDD (WD40EFRX)**
Optimized for NAS systems, this 3.5-inch drive combines 4TB capacity, 5400 RPM speed, and 64MB cache for reliable, energy-efficient performance. Features CMR technology for sustained data integrity in multi-user environments, ensuring durability under 24/7 workloads. SATA 6Gb/s interface enables seamless integration, while NASware® 3.0 enhances compatibility and error recovery. Ideal for home/small business NAS setups, it reduces vibration and power consumption, backed by a 3-year warranty. Built for stability and long-term data protection in RAID configurations.

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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

Small or medium business NAS systems in a 24×7 environment

3-year limited warranty

For Small Or Medium Businesses

Stream, backup, share, and organize your digital content with a NAS and WD Red™ Plus drives designed to effortlessly share content with the devices at your home or business. NASware™ 3.0 technology increases your drives’ compatibility with your existing network and devices. For larger businesses with up to 24 bays, count on WD Red™ Pro drives to deliver exceptional performance.

Exclusive NASware 3.0

Not just any drive will do. Get up to 112TB of capacity in your 8-bay NAS system and with Western Digital’s exclusive NASware 3.0 technology, you can optimize each and every drive. Built into every WD Red™ Plus hard drive, NASware 3.0’s advanced technology improves storage performance by increasing compatibility, integration, upgradeability, and reliability.

Built For Optimum NAS Compatibility

WD Red™ Plus drives with NASware™ technology takes the guesswork out of selecting a drive. 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.

WD Red™ Pro For Big Business

If you’re looking for heavy duty performance for NAS, WD Red™ Pro drives deliver exceptional performance for the medium to large business customer with extreme demands. For NAS environments with 9 to 24 bays, WD Red™ Pro drives deliver uncompromising performance and unwavering assurance backed by a 5-year limited warranty.

 

Interface

SATA 6.0Gb/s

Capacity

4TB

Form Factor

3.5"

Application

NAS

Brand

Western Digital

Width (maximum)

101.60mm

Usage

For NAS systems

Length (maximum)

147.00mm

Cache

64MB

Height (maximum)

26.10mm

Products Status

New

Series

Red Plus

RPM

5400 RPM

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