Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ

Name: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ
Brand: WD
SKU: B0G5YDXKS7
Price: 194.99 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-22

$194.99

Buy on Amazon — $194.99 Compare to similar external storage

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.

Bottom line: The Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ is a niche pick — read recent reviews before buying in the external storage category, priced around $194.99. Read recent reviews carefully before committing.

WD Red Plus drives are designed to handle workloads of power users and small to medium business NAS environments. WD Red Plus drives deliver the speed and capacity required to store, protect and share growing amounts of data in mid-sized RAID-optimized NAS systems with increased power efficiency.

SpecPicks Verdict

SpecPicks classifies Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400… as a niche pick — read recent reviews before buying in the external storage category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. WD's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Pros & Cons

Pros

✓ Available in capacities ranging from 2TB to 12TB
✓ Backed by WD's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

Available in capacities ranging from 2TB to 12TB
For RAID-optimized NAS systems with up to 8 bays
Designed for Continuous Operation
Backed by World-Class Support and Warranty
Tuned for NAS with NASware

Full Specifications

Brand	WD
Color	Red
Model Name	WD Red
Read Speed	180 Megabytes Per Second
Form Factor	3.5-inch
Media Speed	180
Model Number	WD40EFZZ-SPCPAN0
Built-In Media	hard drive
Hard-Drive Size	4 TB
Mfr Part Number	WD40EFZZ
Number of Items	1
Special Feature	3-year limited warranty, NASware, Rotation Vibration (RV) sensors
Hardware Platform	Home NAS, Home Server, Small to Medium Business, NAS enclosure/NAS systems, RAID Setups and Storage Pools
Installation Type	Internal Hard Drive

Ready to buy?

Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" - WD40EFZZ is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.