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Silver 3.5 inch SATA hard drive with circuit board visible

Western Digital

Western Digital WD40EZAZ 4TB 5400 RPM 256MB SATA 3.5" internal hard drive

SKU CH-JG1P-ZWB5B MPN WD40EZAZ

A 4TB 3.5-inch SATA desktop hard drive with 5400 RPM and 256MB cache for everyday computing

  • Total capacity4 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Recording methodSMR
  • Rotational speed5,400 RPM
  • Cache memory256 MB
  • 4TB capacity stores large media libraries and backups
  • 256MB cache improves read responsiveness for everyday desktop tasks
  • SATA 6.0Gb/s interface connects to standard motherboard ports
  • 5400 RPM spindle speed keeps power draw low
  • 5 inch form factor fits typical desktop drive bays

WD Blue 4TB desktop drive for everyday computing

This 3.5 inch internal hard drive is built for daily office and web workloads. It fits standard desktop bays and connects through a SATA 6.0Gb/s interface. The 4TB capacity suits primary storage in home or office PCs.

SMR recording technology shapes write behaviour

The drive uses Shingled Magnetic Recording to reach 4TB at this price point. Sequential reads run at 5400 RPM with 256MB cache, while sustained random writes slow once the cache fills. Buyers needing consistent write throughput for databases or video capture should consider a CMR alternative.

Four terabytes hold large media libraries

The 4TB volume comfortably stores photo collections, documents and local backups with room to spare. Performance drops when the drive is pushed past its cache buffer during heavy multi-tasking or large-file shuffling. It is not suited for high-write NAS arrays or constant surveillance recording.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $72.99
Cheaper than about 62% of the 4,938 comparable items (median $107.99).
Total capacity 4 TB
Higher than about 70% of the 2,372 comparable items (median 2 TB).
Price per TB $18.25 per TB
Cheaper than about 93% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameWD
Product lineBlue
Model nameWD40EZAZ
Total capacity4 TB
Recommended useFor Daily Computing
Performance
Rotational speed5,400 RPM
Storage
Recording methodSMR
Cache memory256 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.6 mm
Maximum length147 mm
Shipping weight0.54 kg
Package size222 × 152 × 74 mm

Questions about this item

How does the 5400 RPM spindle speed affect everyday desktop performance?

The 5400 RPM rotation provides reliable throughput for office tasks, web browsing and bulk file storage, while keeping power draw and noise lower than faster desktop drives.

What does the SATA 6.0Gb/s interface limit in actual use?

The SATA 6.0Gb/s link caps the maximum burst transfer at 6.0Gb/s; sustained read and write speeds will be lower and are governed by the drive's 5400 RPM mechanics and 256MB cache.

Will the 26.10mm height fit a standard 3.5-inch drive bay?

Yes, the 26.10mm height matches the standard 3.5-inch form factor, so it mounts in any desktop bay or tray designed for 3.5-inch drives.

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