WD 4TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD (2-Pack)

BH #WERPNASHD42K
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WD 4TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD (2-Pack)
Key Features
  • 8TB Storage Capacity (2 x 4TB)
  • 3.5" Form Factor
  • SATA III 6 Gb/s Interface
  • 256MB Cache
This B&H Kit bundles two 4TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD, for an overall storage capacity of 8TB. WD Red Pro drives are engineered to deliver high performance and reliability to multimedia and creative pros, medium to large businesses, and commercial and enterprise NAS environments with an unlimited number of drive bays.
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WD Internal HDD Overview

This B&H Kit bundles two 4TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD, for an overall storage capacity of 8TB. WD Red Pro drives are engineered to deliver high performance and reliability to multimedia and creative pros, medium to large businesses, and commercial and enterprise NAS environments with an unlimited number of drive bays.

Highlights
  • 4TB storage capacity
  • For RAID-optimized NAS systems with an unlimited number of bays
  • Workload rating of up 550TB per year and up to a 2 million hours MTBF
Ideal For
  • Multimedia creative pros
  • Medium to large businesses
  • Commercial and enterprise NAS systems
Optimized for NAS with NASware
Western Digital's exclusive NASware technology fine tunes drive parameters to match NAS system workloads, which helps increase performance and reliability.
Designed for Continuous Operation
WD Red Pro hard drives are designed to handle the rigorous demands of high-intensity 24/7 multi-user NAS environments and increase system durability.
Tested for Dependable Compatibility
Western Digital partners with a wide range of NAS system vendors for extensive testing to ensure compatibility with most NAS enclosures.
Protected Against Excessive Vibration
WD Red Pro drives include Rotation Vibration (RV) sensors that anticipate and proactively counteract disturbances caused by increased vibration. By dispersing excess vibration across the drive chassis, turbulence is minimized, performance is maintained, and drives are protected.
Built to Absorb Shock
WD Red Pro hard drives include a multi-axis shock sensor to detect subtle shock events and automatically compensate with dynamic fly height technology to further protect the drives in NAS enclosures.
Limited 5-Year Warranty
Western Digital stands behind their NAS storage solutions with the assurance of a limited 5-year limited warranty and world-class support services for hassle free data storage.
Desktop Drives vs. WD Red Pro
Compatibility
Unlike desktop drives, WD Red hard drives are specifically designed and tested for NAS and include NASware technology which fine tunes drive parameters to match NAS system workloads for optimum performance.
Reliability
Desktop drives aren't typically designed for the demands of an always-on NAS environment. WD Red hard drives are designed to perform under tough conditions encountered in high-intensity 24/7 multi-user NAS environments.
RAID Ready
WD Red hard drives are engineered with RAID error recovery control to help reduce failures within multi-bay NAS systems, unlike most desktop drives that are configured for generic use.
Noise and Vibration Protection
Designed to operate solo, desktop drives typically offer little or no protection from the noise and vibration present in a multi-drive system. WD Red hard drives include Rotation Vibration (RV) sensors that anticipate and proactively counteract disturbances caused by increased vibration often found in multi-bay NAS systems.
UPC: 718037902814

WD Internal HDD Specs

Key Specs
Total Installed Storage
4 TB
Drive Type
SATA III / 3.5" HDD (7200 rpm)
Read Speed
Maximum: 267 MB/s
Write Speed
Maximum: 267 MB/s
Total Installed Storage
4 TB
Drive Type
SATA III / 3.5" HDD (7200 rpm)
Performance
Read Speed
Maximum: 267 MB/s
Write Speed
Maximum: 267 MB/s
Encryption Support
No
Mean Time Between Failures (MTBF)
2.0 Million Hours
Endurance (Total Bytes Written)
550 TB
Electrical
Power Draw
5.8 W (Active)
4.0 W (Idle)
0.3 W (Standby)
Input Power
12 VDC at 2 A
General
Operating Conditions
32 to 149°F / 0 to 65°C
Operating Shock
65 G / 2.0 ms
Storage Conditions
-40 to 158°F / -40 to 70°C
Dimensions
5.8 x 4 x 1.02" / 147.3 x 101.6 x 25.91 mm
Weight
1.59 lb / 0.72 kg
Packaging Info
Package Weight
1.745 lb
Box Dimensions (LxWxH)
7.9 x 5 x 2.5"

WD Internal HDD Reviews

Great HDDs for my NAS

By Damon
Rated 5 out of 5
Date: 2026-04-23

These are just the size I need for my 4-bay NAS at a good price point. I wanted to stick with Western Digital so my backup software and everything else worked together without question.

WD 24TB, Great Drive

By Robert
Rated 5 out of 5
Date: 2026-03-19

My Western Digital DL4100 needed a new 6TB drive, WHY NOT. yes go from 24 TB 6x4. To One 24TB. Will move the other 6x3 data to the new 24TB drives and refresh the other units.

See any errors on this page?

Is the 4TB drive compatible with the Synology ...

Is the 4TB drive compatible with the Synology DS418play?
Asked by: Christopher
Yes, the WD 4TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD (2-Pack) is compatible with the Synology DS418play.
Answered by: JP A
Date published: 2025-11-28

Can the WD 12TB Red Pro be used and fit in a ...

Can the WD 12TB Red Pro be used and fit in a regular PC internal drive bay?
Asked by: Yibo
Yes, the WD 12TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD (BH # WE122KFBXSPC) will work in a desktop with a 3.5" drive bay with a SATA 3 connection. Please note: This drive would not have ideal transfer speeds usually associated with desktop storage.
Answered by: Thomas M
Date published: 2025-07-30

Is the 18TB WD181KFGX-SPCKWN0 a SMR or CMR drive? ...

Is the 18TB WD181KFGX-SPCKWN0 a SMR or CMR drive? It seems very cheap and doesn’t specify this in the specs.
Asked by: Carl
The WD 18TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD (B&H # WE181KFGXCKW) is a CMR based hard drive.
Answered by: Luis F
Date published: 2025-11-28

Do this 26 TB hard drive work with Sabrent USB ...

Do this 26 TB hard drive work with Sabrent USB 3.2 Gen 2 5-Bay 3.5" SATA Hard Drive (BH #SADSSC5B • MFR #DS-SC5B) ?
Asked by: Elie
Yes. The WD 26TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD, BH #WE260KFGXSPC, will work with the Sabrent USB 3.2 Gen 2 5-Bay 3.5" SATA Hard Drive Tray-Less Docking Station, BH #SADSSC5B, http://bit.ly/47iEGiI.
Answered by: Elchanan P
Date published: 2025-08-27

Will these work in a QNAP TVS-h874X (BH ...

Will these work in a QNAP TVS-h874X (BH #QNTV874XI964)?
Asked by: Stephen
Yes, the WD 18TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD will work in the QNAP TVS-h874X.
Answered by: Michael S
Date published: 2025-04-10
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