This article covers Western Digital 4TB WD Blue PC 内蔵ハードドライブ HDD.

Overview

The WD Blue series from Western Digital has long been a staple for internal hard drives in desktop PCs. The WD40EZZX belongs to this series as a 4TB model, featuring a 5400 RPM spindle speed, SATA 6 Gb/s interface, and 128 MB cache in a 3.5-inch form factor. It delivers the reliability and generous capacity that everyday computing demands at a reasonable price point.
This drive is best suited as a secondary storage unit, letting a fast SSD handle the operating system and applications while the HDD stores photos, videos, documents, and other large files. The 4TB capacity provides ample room for game installations and creative work output, and the included Acronis True Image WD Edition cloning software is a welcome bonus for migrating data.
In the market, this drive sits in the entry-to-mid tier of large-capacity storage. While it cannot match the speed of modern NVMe SSDs, it remains a compelling option for users who prioritize cost-effectiveness and capacity over raw performance.

Compatibility Guide

The WD40EZZX uses the 3.5-inch form factor and connects via a SATA 6 Gb/s interface. It fits into standard 3.5-inch drive bays in most desktop PC cases, requiring only a SATA data cable and a SATA power connector from the power supply.
Any motherboard with SATA ports will work without issue, so compatibility concerns are minimal for desktop builds. However, laptops and small-form-factor PCs with only 2.5-inch bays cannot accommodate this drive physically, so those users should consider an external enclosure or a 2.5-inch model instead.
The 5400 RPM spindle speed tends to generate less heat and noise compared to 7200 RPM counterparts, making this drive a reasonable choice for quiet builds or systems that run continuously, such as basic NAS or server setups.

Product Info

The WD40EZZX was released in February 2025 as part of Western Digital's WD Blue series, offering 4TB of storage in a 3.5-inch form factor. Key specifications include a 5400 RPM rotation speed, 128 MB cache, and SATA 6 Gb/s interface, with physical dimensions of 157 x 102 x 28 mm and a weight of 544 g.
Positioned as an entry-to-mid tier storage solution for everyday computing, this drive carries Western Digital's reputation for quality and reliability. Within the WD Blue lineup that scales up to 12TB, the 4TB capacity strikes a practical balance between cost and storage space.
The bundled Acronis True Image WD Edition software facilitates cloning existing systems or data onto the new drive, simplifying the migration process.

Best Use Cases

  • General users seeking a large-capacity destination for photos, videos, and backup data. The 4TB capacity combined with the low-power, low-noise characteristics of a 5400 RPM drive suits everyday data archiving. Those who need fast read/write speeds for an OS drive should look elsewhere.
  • Budget-conscious gamers expanding their game libraries. This HDD offers far more capacity per dollar than an SSD, making it ideal for storing titles you play less frequently. If minimizing load times is your top priority, an SSD remains the better investment.
  • Builders who prioritize a quiet system. The 5400 RPM design generally produces less noise than 7200 RPM drives, fitting well in bedrooms or home offices. However, creative professionals who frequently transfer large files may find the speed insufficient.

Things to Consider

The WD40EZZX spins at 5400 RPM, so OS boot times and application loading will be noticeably slower than with an SSD. Treat this drive as a data repository rather than a system drive for the best experience.
The 3.5-inch form factor means it cannot be installed in laptops or compact PCs that only support 2.5-inch drives. Verify your case's drive bay size before purchasing.
Hard drives are also more susceptible to physical shock and vibration than SSDs. Secure the drive properly inside the case and avoid moving the system while it is running. For long-term data preservation, maintaining a separate backup is always a prudent practice.

FAQ

Q: Can I use this drive as my OS boot drive?
A: Technically yes, but a 5400 RPM HDD will make booting and application launches noticeably slower than an SSD. For a responsive system, install the OS on an SSD and use this drive for data storage instead.
Q: Is this drive suitable for NAS or server use?
A: The low 5400 RPM design keeps heat and power consumption down, which suits 24/7 operation. However, unlike WD's Red series designed specifically for NAS, this drive lacks features tailored for RAID environments, so consider your specific requirements.
Q: Should I choose this HDD or an SSD?
A: Choose an HDD when you need large storage capacity at a low cost, and an SSD when you need fast read/write performance for the OS and frequently used applications. Combining both — SSD for the system and this HDD for data — gives you the best of both worlds.

Product Disclosure (Amazon)

  • Manufacturer: Western Digital Technologies, Inc.
  • Brand: ウエスタンデジタル(Western Digital)
  • Model: WD40EZZX-SPCPBB0
  • ASIN: B0GJ7CVHR6
  • Note: This article covers a manufacturer-made product based on Amazon listing details.