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

In stock. Limit 5 per customer.
Ships from Canada.
  • • Available in capacities ranging from 1-14TB1 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

Learn more about the Western Digital WD40EFPX

Best Seller Ranking #32 in Desktop Internal Hard Drives
Brand WD
Series Red Plus
Model WD40EFPX
Interface SATA 6.0Gb/s
Capacity 4TB
NAND Flash Memory Type Hard Drive
Recording Technology CMR
RPM 5400 RPM
Cache 256MB
Features 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 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.
Usage For NAS systems
Form Factor 3.5"
Height (maximum) 26.10mm
Width (maximum) 101.60mm
Length (maximum) 147.00mm
Additional Information
Date First Available October 29, 2022

Warranty & Returns

Warranty, Returns, And Additional Information


  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

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