Overview

  • Demands of Big Business
    Designed specifically with medium or large scale business customers, WD Red Pro drives are available for up to 24-bay NAS systems. Engineered to handle high-intensity workloads in 24×7 environments. Ideal for archiving and sharing, as well as RAID array extended systems.
  • Technology
    Exclusive advanced firmware technology, NASware 3.0, enables seamless integration, robust data protection and optimal performance for NAS systems operating under heavy demand. Improves storage performance by increasing compatibility, integration, upgradeability, and reliability.
  • Compatibility
    Optimized for NAS systems, unique algorithm balances performance and reliability in NAS and RAID environments. WD Red Plus drive is one of the most compatible drives available for NAS enclosures. Reflection of extensive NAS partner technology engagement and compatibility testing.
  • Protection
    WD Red Pro drives are equipped with a multi-axis shock sensor that automatically detects subtle shock events and dynamic fly height technology which adjusts each read-write function to compensate and protect the data. Protects the drives in larger 24-bay NAS environments.
  • 3D Active Balance
    Our enhanced dual-plane balance control technology improves the overall drive performance and reliability. Hard drives that are not properly balanced may cause excessive vibration and noise in a multi-drive system, reduce the hard drive life span, and degrade the performance.
  • Error Recovery Prevention
    Built specifically for RAID and NAS environments, WD Red Pro drives come equipped with error recovery controls as part of NASware 3.0 technology to help reduce drive fallout in RAID applications
  • Extended Drive Testing
    NAS environment that has up to 24 bays is very demanding on a hard drive with add?ed vibration and heat. This is why every WD Red Pro drive is shipped with extended thermal cycle burn-in testing to help ensure each drive is tested for extended reliable operation
  • Longer Warranty Coverage
    WD Red Pro drives comes with a 5-year limited warranty for an even greater peace of mind.

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Specifications

Capacity & configuration

Storage Capacity
18000GB, 14000GB, 16000GB, 22000GB, 26000GB
Storage Drive Type
HDD
Lighting Type
None

Dimensions & weight

Product Name
Red Pro 18TB NAS Internal Hard Drive
Product Compatibility
Network Attached Storage (NAS)
Product Height
1.028 inches
Product Width
4 inches
Product Weight
24.32 ounces

Features

Brand
WD
Rotational Speed
7200 revolutions per minute
Maximum Read Speed
272 megabytes per second
Maximum Write Speed
272 megabytes per second
Heatsink
No
Internal Or External
Internal
Form Factor
3.5 in.
Interface(s)
SATA
Data Encryption
No
Usage
Network Attached Storage (NAS)
Cache Buffer Size
512 megabytes
Minimum System Requirements
Specifically designed for use in NAS systems with up to 8 bays
UPC
718037875729

Power & warranty

Model Number
WD181KFGX
Warranty - Parts
5 years
Warranty - Labor
5 years

Warranty & protection

Included manufacturer warranty

See manufacturer documentation.

Register your product with the manufacturer within 30 days of delivery.

Warranty service

Manufacturer warranty claims are handled by the manufacturer. We are happy to help you find the right contact: (888) 419-6820.

Customer reviews

Write a review
RAFAELROct 11, 2026 · Verified purchase ★★★★★

Amazing HD - Love the space and speed of this HDD, i will love if the can make it cheaper

McNerdoJun 16, 2026 · Verified purchase ★★★★★

Plug it in and use it - Purchased it for a RAID 0 NAS. It has been fast and reliable.

JinCFeb 18, 2026 · Verified purchase ★★☆☆☆

Buyers beware. - The Pros: Great when it ran in my UGREEN NASync DXP4800 Plus in a raid5 setup. A bit of spin up time maybe 10ish seconds in lag but that could be the hdds or the nas so I wont fault them. The Cons: Bought 4 around April 2025. 1 was doa(clicking) and replaced by best buy because they were within the exchange window. A 2nd failed Feb 2026 less than 1 year later. They are being used in a nas so literally their intended purpose. Only around 6800hr of power on time, at a 50% failure rate for HDDs that you pay a premium for is a bit disappointing. Bad batch? Who knows! Also these are not covered by best buy total protection so be buy at your own risk.

JoelSSep 23, 2025 · Verified purchase ★☆☆☆☆

Sent wrong product in the right packaging. - Delayed installing due to internet issues and the return expired. They sent 6 TB drives in 18 TB packaging. Never buying from best buy again.

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Questions & answers

Ask a question

Email [email protected] or call (888) 419-6820 during business hours.

Free U.S. shippingOn every order. Leaves our store in 1–2 business days, arrives in 3–5 business days.
Free returns for 30 daysNo restocking fee. We email you a prepaid return label.
We can install it tooOptional in-home delivery, installation and haul-away on large appliances.
Talk to our team(888) 419-6820 · Mon–Sat