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€ 115,43
€ 95,40 ex. 21% VAT


in stock (10+ units) | order today = shipped on Monday
  • 4TB 3,5 inch internal hard drive
  • SATA III - 5400RPM - 128MB
  • WD RED Plus
ask for extra discount on higher volumes!

Product Description WD40EFZX

Address intensity with WD Red™ Plus
Packed with the power to handle the NAS environments of small to medium businesses and the increased workloads1 of small and home offices, WD Red™ Plus is ideal for archiving and sharing, as well as rebuilding RAID arrays on systems with ZFS and other file systems. Built and tested for up to 8 bay NAS systems, these drives give you the flexibility, versatility and confidence to store and share your valuable files at home and at work.

For small and medium businesses
Stream, share, organize and back up your digital content using a NAS with WD Red™ Plus drives designed for effortless sharing of content between the devices in your home or office. NASware™ 3.0 technology improves the compatibility of your drives with your existing network and devices. Larger businesses requiring up to 24 bays can count on WD Red™ Pro drives to deliver exceptional performance.

Exclusive NASware 3.0
Not every disc is sufficient. Take advantage of up to 112TB of capacity in your 8-bay NAS system and Western Digital's exclusive NASware 3.0 technology to optimize every single drive. Advanced NASware 3.0 technology is built into all WD Red™ Plus hard drives and improves storage performance by improving compatibility, integration, upgradeability and reliability.

Built for optimal NAS compatibility
WD Red™ Plus drives with NASware™ technology take the guesswork out of selecting a drive. Our unique algorithm, optimized for NAS systems, strikes a good balance between performance and reliability in NAS and RAID environments. It's simple: the WD Red™ Plus drive is one of the most compatible drives available for NAS enclosures. However, don't just rely on our word. WD Red ™ Plus drives are the result of extensive technology involvement with NAS partners and compatibility testing.

The WD Red™ Pro for large companies
If you are looking for top performance for NAS, WD Red™ Pro drives provide exceptional performance for medium and large business customers with extreme demands. For NAS environments with 9 to 24 bays, WD Red™ Pro drives deliver unparalleled performance and never-ending assurance through a five-year limited warranty.

3D Active Balance Plus
Our enhanced dual-plane balance control technology improves the overall performance and reliability of the drive. Hard drives that are not properly balanced can cause excessive vibration and noise in a multi-drive system. This can lead to a shorter hard drive life and performance degradation.

Day and night active environment
Since your NAS system is always on, a reliable drive is crucial. With an MTBF of up to 1 million hours, the WD Red ™ Plus drive is designed to handle 24x7 environments.

Top support and a three-year limited warranty
Upgrade your NAS performance with confidence, backed by a three-year limited warranty coupled with world-class support services included with every WD Red ™ Plus drive.

Desktop drives vs. WD Red™ Plus
Make the right choice for your NAS and choose the drive that has been specially built for the NAS with the right features so that your data is well protected and optimal performance is maintained. When choosing a hard drive for your NAS, consider the following:

Compatibility: Unlike desktop drives, these drives have been specifically tested for compatibility and optimal performance in NAS systems.

Reliability: In the always-active environment of a NAS or RAID, drives can get hot and desktop drives are usually not designed or tested under such conditions. WD Red™ Plus drives are.

Error recovery control: The WD Red ™ Plus NAS hard drives are specially designed with RAID error recovery control to limit the number of errors in the NAS system.

Noise and Vibration Protection: Desktop drives are designed to use one at a time and usually provide little to no protection against the noise and vibration in a multi-drive system. WD Red™ Plus drives are designed to perform optimally in multi-bay NAS environments.

For more information, please visit this products webpage.


  • 4TB WD WD40EFZX with Free Harddisk Protection Box Red
    in stock | You save € 9,95! € 115,43
    € 95,40 ex. 21% VAT
  • 2 x 4TB WD Red Plus WD40EFZX
    in stock | € 230,87
    € 190,80 ex. 21% VAT
  • 3 x 4TB WD Red Plus WD40EFZX
    in stock | € 346,30
    € 286,20 ex. 21% VAT
  • 4 x 4TB WD Red Plus WD40EFZX
    in stock | € 461,74
    € 381,60 ex. 21% VAT
  • 5 x 4TB WD Red Plus WD40EFZX
    in stock | € 577,17
    € 477,00 ex. 21% VAT
  • 6 x 4TB WD Red Plus WD40EFZX
    in stock | € 692,60
    € 572,40 ex. 21% VAT


Size 3,5"
Capacity 4 TB
Type of usage NAS
Interface SATA III (6 Gb/s)
Cache 128 MB
Rotations 5400 RPM
Warranty 3 year
EAN Code 0718037884394

Did you notice a wrong specification? Please let us know.

Model number WD40EFZX
Interface SATA 6 Gb/s
Formatted capacity 4TB
Form factor 3.5-inch
Advanced Format (AF) Yes
Native command queuing Yes
RoHS compliant Yes
Interface transfer rate (max)
Interface speed 6 Gb/s
Internal transfer rate 175 MB/s
Cache (MB) 128
Performance Class 5400 RPM Class
Reliability/Data Integrity
Load/unload cycles 600
Non-recoverable read errors per bits read <1 in 10 ¹⁴
MTBF (hours) 1,000,000
Workload Rate (TB/year) 180
Limited warranty (years) 3
Power Management
12VDC ±10% (A, peak) 1.75
5VDC ±10% (A, peak) -
Average power requirements (W)
Read/Write 4.5
Idle 3.3
Standby/Sleep 0.4
Environmental Specifications
Temperature (°C)
Operating 0 to 65
Non-operating -40 to 70
Shock (Gs)
Operating (2 ms, read/write) 30
Operating (2 ms, read) 65
Non-operating (2 ms) 250
Acoustics (dBA)
Idle 25
Seek (average) 28
Physical Dimensions
Height (in./mm) 1.028/26.1
Length (in./mm) 5.787/147
Width (in./mm, ± .01 in.) 4/101.6
Weight (lb./kg, ± 10%) 1.50/0.68

Did you notice a wrong specification? Please let us know.

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