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WD Red Plus 4TB 3.5" 5400RPM SATA Internal Hard Disk Drive - WD40EFZZ
- Available in capacities ranging from 1-14TB with support for up to 8 bays
- Supports up to 180 TB/yr workload rate
- NASware firmware for compatibility
- Small or medium business NAS systems in a 24x7 environment
- 3-year limited warranty
- Retail or OEM packing may vary
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Overview
Specs
Reviews (1)
WD Red Plus internal HDDs are designed to handle workloads for 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.
Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 2 years
- Limited Warranty period (labor): 2 years
- Read full details
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
- This item is covered by Newegg.ca's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.
Manufacturer Contact Info
- Manufacturer Website
- Support Phone: 1-800-275-4932
- Support Website
- View other products from Western Digital
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The WD Red Plus WD40EFZZ is a 4TB, 3.5-inch SATA internal hard drive designed for small- and medium-business NAS systems, including 24/7 operation. Its support for up to eight bays and a 180TB-per-year workload makes it suitable for multi-drive NAS storage.
Recommended For
- Home NAS owners who want a 4TB drive for shared files, photo libraries, media collections, and scheduled backups in an always-on setup.
- Small-business or home-office teams using a NAS for shared folders and routine file access; WD positions Red Plus for small-to-medium NAS environments and up to eight bays.
- NAS builders setting up a multi-drive RAID system who want a NAS-oriented drive rather than a standard desktop HDD; WD identifies Red Plus as RAID-ready and suitable for NAS systems of up to eight bays.
- Home NAS users placing the system near a living or work area who accept some mechanical drive noise; community reports describe Red Plus drives as comparatively quiet, while noting that HDDs are not silent.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Internal NAS or desktop storage for business and personal use |
| Capacity | 4 TB |
| Interface And Form Factor | Internal 3.5-inch SATA drive with SATA 6 Gb/s connectivity |
| Rotational Speed | 5400 RPM |
| Cache | 128 MB |
| Performance | 180 MB/s read speed with 5.6 ms average latency |
| Features And Warranty | NASware firmware, rotation vibration sensors, and a 3-year limited warranty |
| Model Identifiers | Western Digital WD Red Plus, model WD40EFZZ |



















