Western Digital

Western Digital WD40EZAZ 4TB Blue HDD PC Internal

4.0 (44 reviews)

Expand your PC storage with the Western Digital Blue 4TB internal hard drive featuring 256MB cache and quiet 5400 RPM operation.

$119.75*
In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The Western Digital WD40EZAZ belongs to the well-established WD Blue family, a line built around dependable everyday desktop storage. With 4TB of raw capacity, it offers plenty of room for documents, photos, video libraries, game installs, and backup archives without demanding a premium price. The 256MB cache acts as a buffer between the drive platters and your system, smoothing out data transfers and helping the drive feel responsive during routine file operations. Running at 5400 RPM, the WD40EZAZ trades peak sequential speed for noticeably quieter and cooler operation compared to faster-spinning alternatives—a worthwhile compromise for a secondary storage drive that sits alongside an SSD boot disk.

Western Digital bundles a free license for Acronis True Image WD Edition, which simplifies migrating data from an older drive or creating a full disk image for backup purposes. The drive ships with zero power-on hours and connects through a standard SATA 6 Gb/s interface, making installation as simple as mounting it in a 3.5-inch bay and connecting two cables. While the 1-year warranty is modest, the WD Blue series has a long track record of reliability in light-duty desktop roles. For users who need affordable, high-capacity internal storage and are comfortable with mechanical hard drive speeds, the WD40EZAZ delivers on its core promise without unnecessary complication.

Key Features

Reliable everyday computing

Western Digital quality and reliability

Free Acronis True Image WD Edition cloning software

1 Year Warranty

Zero Power on Hours

Specifications

Brand
Western Digital
Model
WD40EZAZ
Capacity
4TB
Interface
SATA 6 Gb/s
Spindle Speed
5400 RPM
Cache
256 MB
Form Factor
3.5"
Series
WD Blue
Warranty
1 Year

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Pros & Cons

👍 Pros

  • 4TB capacity provides substantial storage for documents, media, and applications at an affordable price point.
  • 256MB cache helps improve read and write performance for frequently accessed data.
  • 5400 RPM spin speed runs quieter and cooler than 7200 RPM drives, well suited for everyday desktop use.
  • Includes Acronis True Image WD Edition for straightforward drive cloning and data migration.
  • Standard SATA 6 Gb/s interface ensures broad compatibility with desktop systems.

👎 Cons

  • 5400 RPM speed is slower than 7200 RPM drives, resulting in longer load times for large files.
  • Not designed for NAS, surveillance, or enterprise workloads that require 24/7 operation.
  • Only a 1-year warranty, which is shorter than the 2-year coverage offered on some competing desktop drives.
  • As a mechanical hard drive, it is significantly slower than an SSD for boot and application loading.
  • No built-in hardware encryption for data security.

Frequently Asked Questions

It uses a standard SATA 6 Gb/s interface, compatible with virtually all desktop motherboards and SATA controllers.
The WD Blue line is designed for everyday desktop computing. For NAS or server use, Western Digital recommends their Red or Ultrastar product lines, which are rated for 24/7 operation.
Yes, it includes a free license for Acronis True Image WD Edition, which allows you to clone your existing drive to this one for easy migration.
It is a standard 3.5-inch internal hard drive, designed to fit in desktop PC drive bays.
Yes, Western Digital states this drive ships with zero power-on hours, meaning it is new and unused.