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Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGX
Western Digital

Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD (WD120EFGX)

Bottom line: The Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD ($466.56 on Amazon as of 2026-10-06): CMR recording keeps RAID rebuild and sustained write speed intact, unlike SMR NAS drives.

$466.56

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Buy on Amazon — $466.56 Compare to similar drives & media

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ CMR recording keeps RAID rebuild and sustained write speed intact, unlike SMR NAS drives
  • ✓ 512 MB cache plus 7200 RPM spindle for faster random access than 5400 RPM NAS tiers
  • ✓ Rated for a 180 TB/yr workload, well above typical SOHO array duty
  • ✓ NASware firmware validated for 24x7 multi-bay enclosures up to 8 bays

Cons

  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

The WD Red Plus WD120EFGX is a 12TB, 3.5-inch NAS hard drive built for small- to medium-business and SOHO storage arrays that run around the clock. It spins at 7200 RPM over a SATA 6 Gb/s interface, pairs a 512 MB cache with CMR recording, and runs WD's NASware firmware so it negotiates cleanly with multi-bay enclosures instead of dropping out of an array mid-rebuild. Because it is CMR rather than SMR, sustained random writes and RAID rebuilds on ZFS and other parity file systems hold their speed instead of collapsing partway through, which is the failure mode that makes shingled drives a…

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SpecPicks Verdict

SpecPicks scored Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD using a rating × review-volume × price-fit model applied to published specs and reviews across the drives & media category. Western Digital's drives & media lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for drives & media of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Available in capacities ranging from 1-14TB with support for up to 8 bays.Data Transfer Rate:6Gbps.Specific uses: Business
  • Supports up to 180 TB/yr workload rate | Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred ✕ (8760 / recorded power-on hours)). Workload Rate will vary depending on your hardware and software components and configurations.
  • NASware firmware for compatibility
  • Small or medium business NAS systems in a 24x7 environment, Compatibility: Unlike desktop drives, these drives are specifically tested for compatibility with NAS systems for optimum performance.
  • 3-year limited warranty

Full Specifications

BrandWD
ColorRed
Model NameWD Red Plus
Read Speed260 Megabytes Per Second
Form Factor3.5-inch
Media Speed490 megabytes_per_second
Model NumberWD120EFGX-SPCPHN0
Built-In Mediahard drive
Hard-Drive Size12 TB
Mfr Part NumberWD120EFGX
Number of Items1
Special FeatureDust Resistant
Hardware PlatformWD
Installation TypeInternal Hard Drive
Compatible DevicesDesktop
Data Transfer Rate260 Megabytes Per Second
Enclosure MaterialInformation Not Available
Additional FeaturesDust Resistant
Hard Disk InterfaceSerial ATA-600
Warranty Description3-year limited warranty
Full listing titleWestern Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGX

Ready to buy?

Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGX is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $466.56

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGX
$466.56
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