Western Digital

Western Digital WD201KFGX 20TB Red Pro NAS Hard Drive

4.4 (5371 reviews)

High-Capacity Storage for Demanding NAS EnvironmentsThe Western Digital WD Red Pro NAS Internal Hard Drive offers high-performance and reliable storage for medium to large-scale NAS systems. Designed for 24/7 operation and high-intensity workloads, it ensures data integrity and accessibility. Spe...

$1,199.99*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

High-Capacity Storage for Demanding NAS Environments

The Western Digital WD Red Pro NAS Internal Hard Drive offers high-performance and reliable storage for medium to large-scale NAS systems. Designed for 24/7 operation and high-intensity workloads, it ensures data integrity and accessibility.

Specifications:

  • Capacity: 20TB
  • Rotational Speed: 7200 RPM
  • Interface: SATA 6 Gb/s
  • Cache: 512 MB
  • Form Factor: 3.5"
  • Technology: CMR
  • Workload Rate: 550TB/yr

Key Features

Available in capacities ranging from 2 to 22TB(1) | (1) 1GB = 1 billion bytes and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.

For RAID-optimized NAS systems with unlimited number of bays

Rated for 550TB/yr workload rate(2) | (2) Annualized Workload Rate = TB transferred x (8760 / recorded power-on hours). The maximum rated workload is specified for operating at typical temperature of 40C. Workload Rate will vary depending on your hardware and software components and configurations.

Designed to handle the demands of high-intensity 24x7 multi-user NAS environments

Western Digital partners with a wide range of NAS system vendors for extensive testing to ensure compatibility with most NAS enclosures

Specifications

Capacity
20TB
Series
Red Pro
Optimized For
RAID-optimized NAS systems
Maximum Bays Support
Unlimited
Workload Rate
550TB/yr
Operating Environment
24x7 multi-user NAS environments

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Pros & Cons

👍 Pros

  • Offers a substantial storage capacity of 20TB, providing ample space for large datasets and extensive NAS usage.
  • Specifically designed for RAID-optimized NAS systems, ensuring robust performance and data integrity in multi-drive environments.
  • Rated for a high 550TB/yr workload rate, indicating its durability and suitability for demanding 24x7 multi-user NAS environments.
  • Western Digital partners with NAS system vendors for extensive testing, ensuring broad compatibility with various NAS enclosures.
  • Ideal for environments requiring continuous operation, such as home servers, small business NAS, and professional storage solutions.

👎 Cons

  • The high capacity and specialized nature mean it is likely priced higher than standard desktop hard drives, making it a significant investment.
  • The "Red Pro" series is designed for NAS, and while it can technically be used in a desktop, its optimizations are geared towards NAS workloads and may not offer peak performance benefits in a single-drive PC setup.
  • The specified 550TB/yr workload rate is based on typical temperature of 40C, and performance may vary outside these conditions.
  • Details about rotational speed (RPM) are not provided, which can be a key factor for performance-conscious buyers.
  • While tested for compatibility, actual performance can still be influenced by the specific NAS enclosure, controller, and system configuration.

Frequently Asked Questions

This Western Digital WD201KFGX hard drive offers a substantial storage capacity of 20TB.
This drive is specifically designed for RAID-optimized NAS (Network Attached Storage) systems and is rated for environments with an unlimited number of bays.
The 550TB/yr workload rate indicates the maximum amount of data that can be transferred to or from the drive annually, signifying its durability for demanding 24x7 multi-user NAS environments.
Yes, Western Digital partners with a wide range of NAS system vendors for extensive testing, ensuring compatibility with most NAS enclosures.
While it may function in a desktop, the Western Digital Red Pro is optimized for NAS environments and its specific features are geared towards such demanding, continuous operation.