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Silver 3.5 inch internal hard drive with circuit board visible

Western Digital

Western Digital WD30EFPX 3TB 5400 RPM 256MB CMR SATA 3.5" internal hard drive

SKU CH-GH3X-VVYNW MPN WD30EFPX

3 TB CMR drive with 256 MB cache and 5400 RPM, built for NAS systems up to 8 bays

  • Total capacity3 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Flash memory capacityHard Drive
  • Recording methodCMR
  • Rotational speed5,400 RPM
  • 3 TB capacity stores large media libraries
  • CMR recording technology ensures consistent write performance
  • 256 MB cache accelerates frequent data access
  • Designed for NAS systems with up to 8 bays
  • 5400 RPM operation balances speed and quiet operation

Built for NAS arrays up to eight bays

The Western Digital WD30EFPX is a 3TB CMR hard drive designed for network-attached storage in home offices and small-to-medium businesses. Its conventional magnetic recording handles continuous multi-user workloads such as file sharing, backup and media streaming. The 3.5-inch form factor fits standard drive trays in compatible NAS enclosures.

CMR recording with 256 MB cache

Conventional magnetic recording avoids the rewrite penalties of shingled drives, keeping sustained throughput steady during heavy read and write activity. The 256 MB cache absorbs burst traffic and smooths random I/O across the SATA 6.0 Gb/s interface. This combination makes the drive suitable for RAID arrays that demand predictable latency.

Low-RPM acoustics and modest power draw

Spinning at 5400 RPM, the drive runs quieter than faster desktop models and generates less heat inside a multi-bay chassis. Typical idle and active power consumption stays within the thermal envelope of compact NAS appliances. The 26.1 mm z-height matches the standard 3.5-inch drive bay used by most enclosures.

How it compares

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

Price $80.99
Cheaper than about 59% of the 4,938 comparable items (median $107.99).
Total capacity 3 TB
Higher than about 60% of the 2,372 comparable items (median 2 TB).
Price per TB $27.00 per TB
Cheaper than about 86% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameWD
Product lineRed Plus
Model nameWD30EFPX
Total capacity3 TB
Recommended useFor NAS systems
Performance
Rotational speed5,400 RPM
Memory
Flash memory capacityHard Drive
Storage
Recording methodCMR
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 weight0.23 kg
Package size196 × 152 × 25 mm

Questions about this item

What does the 5400 RPM speed mean for daily NAS use?

The 5400 RPM spindle provides steady throughput for multi-user file access and media streaming in NAS enclosures with up to eight bays.

How does the SATA 6.0Gb/s interface affect real-world transfer rates?

The SATA 6.0Gb/s link connects the 256MB cache to the host, letting burst transfers reach the interface limit while sustained speeds follow the mechanical design.

Will the 3.5-inch form factor fit my NAS tray?

The drive measures 147.00mm long, 101.60mm wide and 26.10mm high, matching the standard 3.5-inch drive bay used in most NAS chassis.

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