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)
4TB RED PLUS INTERNAL NAS HDD 3.5IN
Learn more about the Western Digital WD40EFZZ
Model
Brand
Western Digital
Model
WD40EFZZ
Performance
Capacity
4TB
RPM
5400 RPM
Interface
SATA
Dimensions
Form Factor
3.5"
Performance
Cache
128MB
Model
Part Number
WD40EFZZ
Performance
Flash Memory Capacity
4 TB
Features
Usage
For NAS systems
Dimensions
Height (maximum)
14.69in
Width (maximum)
0.16in
Length (maximum)
2.61in
Manufacturer Warranty
Parts
3 Years
Labor
3 year limited warranty
Additional Information
First Listed on Newegg
April 23, 2026
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Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
Limited Warranty period (parts): 3 years
Limited Warranty period (labor): 3 years
Return Policies
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 to 60 days.
Return for refund within: 60 days
Return for replacement within: 60 days
Restocking Fee: Yes
This item is covered by NeweggBusiness.com's Iron Egg Guarantee Return Policy.