Western Digital Green 4TB WD40EZRX Fascicule

WD GREEN

™

Desktop Hard Drives

WD Green hard drives are designed for use in systems 
that require cool and quiet operation in PCs, or for external 
enclosures and other applications for which low noise and 
low heat are beneficial. These reliable hard drives are ideal for 
use whenever energy efficiency, lower power consumption 
and massive capacity are needed.

INTERFACE

SATA 6 Gb/s

WIDTH/HEIGHT

3.5-inch/1-inch

ROTATIONAL SPEED

IntelliPower

™

CAPACITIES

500 GB to 4 TB

MODEL NUMBERS

WD40EZRX

WD15EZRX

WD30EZRX

WD10EZRX

WD20EZRX

WD5000AZRX

Note: Not all products may be 

available in all regions of the world.

Product Features

As a leader in hard drive 

manufacturing, WD proudly 

guarantees our hard drives are built 

with 100% conflict-free raw materials.

In addition to being RoHS compliant, 

all WD Green drives are lead and 

halogen free.

WD’s next-generation WD Green hard 

drives are built using less rare earth 

minerals.

Best-in-class power management 

technology delivers significant power 

savings and solid performance.

WD GreenPower Technology

™

 yields 

lower operating temperatures for 

increased reliability and low acoustics 

perfect for ultra-quiet PCs and 

external drives. 

™

The recording head never touches 

the disk media ensuring significantly 

less wear to the recording head 

and media as well as better drive 

protection in transit.

™

Calculates optimum seek speeds to 

lower power consumption, noise and 

vibration.

We perform tests on hundreds of 

systems and a multitude of platforms 

in our FIT Lab

™

 to give our customers 

confidence that our drives will work in 

their systems.

Applications

WD Green hard drives are tested and recommended for use as secondary storage in PCs, external enclosures and applications that require cool and 

quiet operation. Desktop drives are not recommended for use in RAID environments. Please consider using WD Red

™

 hard drives for home and small office 1-5 

bay NAS systems and WD Datacenter hard drives for rackmount and NAS systems with more than 5 bays.*

*  WD hard drives are designed and tested for use in specific applications and environments. This ensures that your hard drive is compatible with and functions properly in your application. 

Our hard drives are warranted against defects in materials and workmanship in the system for which they were designed. Use in systems other than for what the hard drive was  

designed could result in compatibility problems that affect proper function, unrelated to material and/or workmanship defects. For best results, be sure to select the appropriate product  

for your application by consulting our product spec sheets on our website at www.wd.com or by calling our customer support line where we would be happy to help you through the 

selection process.

The WD Advantage

WD puts our products through extensive Functional Integrity Testing (F.I.T.) prior to any product launch. This testing ensures our products consistently meet the 

highest quality and reliability standards of the WD brand. WD also has a detailed Knowledge Base with more than 1,000 helpful articles as well as helpful software 

and utilities. Our customer support lines have longer operational hours to ensure you get the help you need when you need it. Our toll-free customer support lines 

are here to help or you can access our WD Support site for additional details.