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Silver 3.5-inch SATA hard drive with label showing model WD20EFPX

Western Digital

Western Digital WD20EFPX Red Plus 2TB 3.5" SATA internal hard drive

SKU CH-DZ1Z-1T700 MPN WD20EFPX

A 2TB 3.5" SATA internal hard drive built for NAS systems with CMR technology and 64MB cache

  • Total capacity2 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Flash memory typeHard Drive
  • Rotational speed5,400 RPM
  • Cache memory64 MB

Capacity 2TB

Show 4 more
  • Designed for 24/7 NAS operation
  • 180 TB/yr workload rate supported
  • CMR technology with 64MB cache
  • SATA 6.0Gb/s interface for broad compatibility
  • NASware firmware optimises drive parameters

2 TB NAS drive for small arrays

The Western Digital WD20EFPX Red Plus is a 3.5-inch SATA hard drive built for 24×7 operation in NAS enclosures with up to eight bays. Its CMR recording and 64 MB cache suit home users and small businesses that need dependable bulk storage.

NASware firmware tunes drive behaviour

The drive runs Western Digital NASware firmware, which adjusts error-recovery and power-management parameters for RAID workloads. This optimisation reduces unnecessary drive drops and improves rebuild times in multi-bay systems.

2 TB capacity with 180 TB/yr rating

The 2 TB volume handles everyday file shares, backups and media libraries in a small array. The 180 TB per year workload rating sets the practical limit; heavier write-intensive applications will exceed the drive’s design envelope.

How it compares

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

Price $122.99
Typical for this category: the median of 4,938 items is $107.99.
Total capacity 2 TB
Typical for this category: the median of 2,372 items is 2 TB.
Price per TB $61.50 per TB
Typical for this category: the median of 2,365 items is $62.21 per TB.

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Specifications

Product
Brand nameWD
Product lineRed Plus
Model nameWD20EFPX
Total capacity2 TB
Recommended useFor NAS systems
Performance
Rotational speed5,400 RPM
Storage
Flash memory typeHard Drive
Cache memory64 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 weight0.64 kg
Package size191 × 127 × 64 mm

Other versions of this model

5 more in the same range

Questions about this item

What maintenance or replacement will the 64MB cache CMR drive need later?

No routine maintenance is required; the CMR 64MB cache drive is designed for continuous 24x7 operation and carries a 3-year limited warranty.

What limit shows up first under sustained use on this 5400 RPM SATA 6.0Gb/s drive?

The 180 TB per year workload rate is the first sustained-use limit for this NAS-optimised drive.

How much noise, heat or power does the 3.5 inch 5400 RPM drive produce running all day?

Built for 24x7 NAS environments with increased power efficiency, the 5400 RPM drive runs cool and quiet in multi-bay enclosures.

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