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Standard 3.5-inch silver internal hard drive with green label

Western Digital

Western Digital WD161KFGX 16TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive

SKU CH-8FY5-GXZ52 MPN WD161KFGX

A 16 TB CMR drive built for 24-bay NAS systems, running at 7200 RPM with 512 MB cache and a 300 TB yearly workload rating

  • Total capacity16 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Recording methodCMR
  • Rotational speed7,200 RPM
  • Cache memory512 MB

Capacity 16TB

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  • Massive 16TB capacity meets growing data demands
  • 7200 RPM performance handles simultaneous multi-user access
  • 512MB cache accelerates data access and responsiveness
  • CMR recording technology ensures consistent sustained throughput
  • Built for 24/7 NAS operation with 300TB/year workload rating

WD Red Pro 16TB NAS drive

The WD Red Pro WD161KFGX is a 16TB 3.5-inch internal hard drive built for network-attached storage. It spins at 7200 RPM with a 512MB cache and connects through a SATA 6.0Gb/s interface. CMR recording technology and 3D Active Balance Plus are designed for sustained multi-user workloads in always-on systems.

Suited for multi-bay NAS up to 24 bays

This drive targets businesses and advanced home users who need high-capacity, 24/7 storage in enclosures that hold up to 24 drives. It supports workloads up to 300TB per year and includes NASware 3.0 for error recovery. Builders needing a smaller footprint, a different interface, or drives rated for lighter desktop use should consider other options.

Fits standard 3.5-inch bays with SATA power and data

The unit measures 147mm long, 101.6mm wide and 26.1mm high, matching common NAS trays. It requires a SATA data cable and a SATA power connection from the host system. The large 512MB cache helps maintain consistent throughput for simultaneous file transfers, freeing the controller from frequent small-request overhead.

How it compares

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

Price $565.99
Pricier than about 90% of the 4,938 comparable items (median $107.99).
Total capacity 16 TB
Higher than about 92% of the 2,372 comparable items (median 2 TB).
Price per TB $35.37 per TB
Cheaper than about 76% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameWD
Product lineRed Pro
Model nameWD161KFGX
Total capacity16 TB
Recommended useEnterprise NAS Hard Drives
Performance
Rotational speed7,200 RPM
Storage
Recording methodCMR
Cache memory512 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 weight0.91 kg
Package size196 × 152 × 51 mm

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