---
product_id: 113561397
title: "WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4"
brand: "western digital"
price: "€ 354.39"
currency: EUR
in_stock: true
reviews_count: 8
category: "Western Digital"
url: https://www.desertcart.sk/products/113561397-wd40efrx-wd-red-nas-hard-drive-hard-drive-4-tb
store_origin: SK
region: Slovakia
---

# WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4

**Brand:** western digital
**Price:** € 354.39
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 by western digital
- **How much does it cost?** € 354.39 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/113561397-wd40efrx-wd-red-nas-hard-drive-hard-drive-4-tb)

## 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

## Description

wd A Long-time Leader In Hard Drive Technology Designs And Manufactures The #1 Selling Internal And External Hard Drives And Award-winning Media Players And Network Drives

Review: Works great in TrueNAS - Works great as a replacement drive in my TrueNAS configuration.
Review: Good drive for the price! - It does it’s job well! Good price too

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01IF6879G |
| Additional Features | Portable |
| Best Sellers Rank | #85 in Internal Hard Drives |
| Brand | Western Digital |
| Built-In Media | Hard drive, SATA cable, Power adapter |
| Cache Memory Installed Size | 64 |
| Color | Red |
| Compatible Devices | Desktop |
| Connectivity Technology | SATA |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.0 out of 5 stars 180 Reviews |
| Data Transfer Rate | 750 Megabytes Per Second |
| Digital Storage Capacity | 4000 GB |
| Enclosure Material | Aluminum |
| Form Factor | 3.5-inch |
| Global Trade Identification Number | 08809481922595 |
| Hard Disk Description | Raid |
| Hard Disk Form Factor | 3.5 Inches |
| Hard Disk Interface | SATA 6 GB/s |
| Hard Disk Rotational Speed | 5400 RPM |
| Hard-Drive Size | 4 TB |
| Hardware Connectivity | SATA 6.0 Gb/s |
| Installation Type | Internal Hard Drive |
| Item Weight | 0.01 Ounces |
| Manufacturer | WESTERN DIGITAL TECH |
| Media Speed | 180 MB/s |
| Model Name | My Cloud EX2 |
| Model Number | WD40EFRX |
| Number of Items | 1 |
| Read Speed | 750 Megabytes Per Second |
| Special Feature | Portable |
| Specific Uses For Product | storage |
| UPC | 718037810058 045923496301 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Western Digital
- **Color:** Red
- **Compatible Devices:** Desktop
- **Connectivity Technology:** SATA
- **Digital Storage Capacity:** 4000 GB
- **Hard Disk Description:** Raid
- **Hard Disk Form Factor:** 3.5 Inches
- **Hard Disk Interface:** SATA 6 GB/s
- **Installation Type:** Internal Hard Drive
- **Special Feature:** Portable

## Images

![WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 - Image 1](https://m.media-amazon.com/images/I/516ATVgjPOS.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great in TrueNAS
*by M***E on October 2, 2025*

Works great as a replacement drive in my TrueNAS configuration.

### ⭐⭐⭐⭐⭐ Good drive for the price!
*by R***Z on May 22, 2021*

It does it’s job well! Good price too

### ⭐ Uh.... No.
*by S***D on October 30, 2025*

Drive failed on install. Oyen 5 bay ran 3 days. No workee. Called WD. Turns out unit warranty expired 2019. In other words, i paid money for a non-functional museum piece. Waste of my time. 5-star on the flake-o-meter.

## Frequently Bought Together

- Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4
- Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD120EFAX

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**Shop now:** [https://www.desertcart.sk/products/113561397-wd40efrx-wd-red-nas-hard-drive-hard-drive-4-tb](https://www.desertcart.sk/products/113561397-wd40efrx-wd-red-nas-hard-drive-hard-drive-4-tb)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-21*