Western Digital
4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
Bottom line: The 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX is a niche pick — read recent reviews before buying in the nas & home servers category, priced around $295.00. Read recent reviews carefully before committing.
Packed with power to handle the small- to medium-sized business NAS environments and increased workloads for SOHO customers, WD Red Plus is ideal for archiving and sharing, as well as RAID array rebuilding on systems using ZFS and other file systems. Built and tested for up to 8-bay NAS systems, these drives give you the flexibility, versatility, and confidence in storing and sharing your precious home and work files.
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 nas & home servers category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Western Digital'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 nas & home servers 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 1-14TB with support for up to 8 bays
- ✓ Backed by Western Digital'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 1-14TB with support for up to 8 bays
- 5400RPM performance class
- Supports up to 180 TB/yr workload rate*| * Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred ✕ (8760 / recorded power-on hours))
- NASware firmware for compatibility
- Small or medium business NAS systems in a 24x7 environment
- 3-year limited warranty
Full Specifications
| UPC | 718037810058 178529612698 721762513538 065030805728 013591023082 722076588649 |
|---|---|
| ASIN | B00EHBERSE |
| Brand | Western Digital |
| Color | Red |
| Model Name | WD40EFRX |
| Unit Count | 1.0 Count |
| Form Factor | 3.5-inch |
| Item Weight | 680 Grams |
| Media Speed | 5200 rpm |
| Manufacturer | Western Digital |
| Model Number | WD40EFRX |
| Built-In Media | Hard Drive |
| Hard-Drive Size | 4 TB |
| Number of Items | 1 |
Ready to buy?
Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX 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.
*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.
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