---
product_id: 249648680
title: "18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5\" - WD181KFGX"
brand: "western digital"
price: "$1635.39"
currency: USD
in_stock: true
category: "Western Digital"
url: https://www.desertcart.us/products/249648680-18tb-wd-red-pro-nas-internal-hard-drive-hdd-7200
store_origin: US
region: United States of America
---

# 285 MB/s blazing transfer 18TB massive capacity 5-year rock-solid warranty 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD181KFGX

**Brand:** western digital
**Price:** $1635.39
**Availability:** ✅ In Stock

## Summary

> 💼 Elevate your data game with pro-level storage power!

## Quick Answers

- **What is this?** 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD181KFGX by western digital
- **How much does it cost?** $1635.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/249648680-18tb-wd-red-pro-nas-internal-hard-drive-hdd-7200)

## Best For

- western digital enthusiasts

## Why This Product

- Trusted western digital brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Massive 18TB Storage:** Store your entire digital empire without compromise.
- • **RAID & NAS Optimized:** Built for 24/7 multi-user environments with enterprise-grade reliability.
- • **512MB Cache Powerhouse:** Turbocharge your workflow with ultra-responsive performance.
- • **Blazing 7200 RPM Speed:** Experience rapid data access and seamless multitasking.
- • **Peace of Mind Warranty:** Backed by a 5-year limited warranty to protect your investment.

## Overview

The Western Digital 18TB WD Red Pro NAS Internal Hard Drive is a high-capacity, high-performance mechanical drive designed for demanding NAS and RAID environments. Featuring a 7200 RPM spindle speed, 512MB cache, and SATA 6 Gb/s interface, it delivers up to 285 MB/s transfer rates for fast, reliable data handling. Engineered for continuous 24/7 operation, it supports multi-user workloads with enterprise-grade durability and comes with a reassuring 5-year limited warranty.

## Description

The Western Digital WD181KFGX NAS Hard Drive is a high-performance, reliable storage solution for commercial and enterprise NAS environments. With a generous 18TB capacity, this mechanical hard disk is optimized for high-intensity workloads in 24/7 multi-user settings. It boasts a read speed of 285 megabytes per second and a data transfer rate of up to 285 megabytes per second, ensuring quick and efficient data transfers. The 512MB cache memory and 7200 rpm rotational speed further enhance its performance. This 3.5-inch internal hard drive is NAS-optimized, RAID-optimized, and compatible with a variety of NAS devices. It comes with a 5-Year Limited Warranty, offering peace of mind for your storage needs.

## Features

- Capacity: 18 TB, providing ample space for storing large amounts of data in commercial and enterprise NAS environments
- Cache Size: 512MB, allowing for faster data access and improved performance
- Transfer Rate: up to 285 MB/s, ensuring quick and efficient data transfer
- Form Factor: 3.5-inch, designed for use in multi-bay RAID-optimized NAS systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08K3TFM92 |
| Additional Features | High-Intensity Workload Handling, RAID-Optimized, NAS-Optimized |
| Best Sellers Rank | #3 in Internal Hard Drives |
| Brand | Western Digital |
| Built-In Media | hard drive |
| Cache Memory Installed Size | 512 |
| Color | Red |
| Compatible Devices | NAS Devices |
| Connectivity Technology | SATA |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 3.9 out of 5 stars 2,308 Reviews |
| Data Transfer Rate | 285 megabytes_per_second |
| Digital Storage Capacity | 18 TB |
| Enclosure Material | Information Not Available |
| Form Factor | 3.5-inch |
| Global Trade Identification Number | 00718037875729, 71803787572900 |
| Hard Disk Description | Mechanical Hard Disk |
| Hard Disk Form Factor | 3.5 inches |
| Hard Disk Interface | Serial ATA-600 |
| Hard Disk Rotational Speed | 7200 rpm |
| Hard-Drive Size | 18 TB |
| Hardware Connectivity | SATA 6.0 Gb/s |
| Hardware Platform | PC |
| Installation Type | Internal Hard Drive |
| Item Dimensions L x W x Thickness | 1"L x 6"W x 4"Th |
| Item Type Name | Hard Drive |
| Item Weight | 1.2 pounds |
| Manufacturer | Western Digital Technologies, Inc. |
| Media Speed | 285 |
| Mfr Part Number | WD181KFGX |
| Model Name | WD Red Pro |
| Model Number | WD181KFGX-SPAFPN0 |
| Number of Items | 1 |
| Read Speed | 285 megabytes_per_second |
| Special Feature | High-Intensity Workload Handling, RAID-Optimized, NAS-Optimized |
| Specific Uses For Product | business, personal |
| UPC | 718037875729 |
| Unit Count | 1 Count |
| Warranty Description | 5 year limited warranty |

## Product Details

- **Brand:** Western Digital
- **Color:** Red
- **Compatible Devices:** NAS Devices
- **Connectivity Technology:** SATA
- **Digital Storage Capacity:** 18 TB
- **Hard Disk Description:** Mechanical Hard Disk
- **Hard Disk Form Factor:** 3.5 inches
- **Hard Disk Interface:** Serial ATA-600
- **Installation Type:** Internal Hard Drive
- **Special Feature:** High-Intensity Workload Handling, RAID-Optimized, NAS-Optimized

## Images

![18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD181KFGX - Image 1](https://m.media-amazon.com/images/I/61+spJ-LcBL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: 4 of these drives good for 32tb 24/7 dlna nas server? Don’t want to beat a dead horse here... Really it’s just to stream my 10Bit 4K movies using DLNA**
A: It all depends on what size and what RAID configuration you are asking about.  Most people would be using RAID 5 or something like Synology's SHR (similar to RAID 5 but doesn't require equal size hard drives) for this purpose. If you are thinking that 4x8TB will give you 32TB of storage that is not correct in RAID 5 because of the overhead used for data protection.  It works like this for RAID 5, 4x8TB = 24TB storage, 4x10TB = 30TB storage, 4x12 = 36TB storage.  So first determine which RAID configuration works best for you and then find a RAID calculator available online to choose your RAID configuration and hard drive size.  If you just want speed, with no parity checking then you could go with 4x8TB or 2x16 TB (whichever is cheaper) in RAID 0 for 32TB of storage but file corruption could be an issue and there is a possibility that you can only do 2 hard drives in RAID depending on your hardware.
Having said all that, these drives will certainly stream 4k 10-bit HDR movies over DLNA.  Streaming 4k is just as much up to the software and hardware of your computer than it is the hard drives.  A nicely configured Windows machine, for example, may stream them fine however a less powerful NAS device may not.  There are a lot of moving parts but these drives will not be an issue.  There are also issues with playing the 265 codecs in Windows 10 Media Player but the same files that will not play in Media Player, will stream via DLNA to my LG TV just fine and play in full 2160p HDR with no problem.  These same files will show up fine in my 9 year old NAS but will not stream via DLNA on it but photos stream fine.  So it all depends on your exact configuration.  But the drives are fine.
If it all gets too hard then just get a fast (say 400 MB per second) USB stick and copy 10 movies at a time on to it and plug it into your TV.  The Samsung BAR Plus 256 GB works well for this in my experience.  You can also look into getting streaming server software on your computer and a client connected to your TV.

**Q: What is the difference between this and the WD Black drive?**
A: The Red is engineered for 24/7 usage.  The Black is not.

**Q: Is the red wd drives better for cctv/nvr in raid setup than the purple drives? i hear purple drives are not lasting long. both red and purple are 24/7**
A: I use my purple drives with 9 cameras 24 x 7 and have over three years without a single failure.  pretty good if you ask me.

**Q: Can I use this as an external storage for my desktop?**
A: I have four of the earlier 3tB versions of this drive in external USB3 enclosures and use them in rotation for critical full system backups. They have served very well in that capacity. I also have one of the 3tB drives in my main daily-driver computer now and it does that quite well although it isn't as fast as some but since it is used mostly for secondary data store it doesn't matter so much. The reason that I have so many of the older 3tB drives is that I upgraded all of the drives in my Drobo NAS to 6tB drives a while back. Those drives as well as five of the 8tB units in another NAS have worked perfectly so I can highly recommend them (for the proper use, of course).

## Frequently Bought Together

- Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD181KFGX
- SAMSUNG 990 PRO SSD NVMe M.2 PCIe Gen4, M.2 2280 Internal Solid State Hard Drive, Seq. Read Speeds Up to 7,450 MB/s for High End Computing, Gaming, and Heavy Duty Workstations, MZ-V9P2T0B/AM

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-10-17*