---
product_id: 195809213
title: "WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX"
brand: "western digital"
price: "AR$1606041"
currency: ARS
in_stock: true
url: https://www.desertcart.com.ar/products/195809213-wd-red-4tb-3-5-inch-nas-internal-hard-drive
store_origin: AR
region: Argentina
---

# 4TB massive storage 180TB/year workload endurance 5400 RPM optimized speed WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX

**Brand:** western digital
**Price:** AR$1606041
**Availability:** ✅ In Stock

## Summary

> 🔴 Power your NAS with WD Red — storage that works as hard as you do!

## Quick Answers

- **What is this?** WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX by western digital
- **How much does it cost?** AR$1606041 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/195809213-wd-red-4tb-3-5-inch-nas-internal-hard-drive)

## 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 4TB Capacity:** Store your entire digital life and then some—perfect for growing NAS demands.
- • **3-Year Limited Warranty:** Confidence backed by Western Digital’s trusted support, ensuring your data stays protected long-term.
- • **Sustained High Workload:** Handles up to 180TB of data transfer annually—ideal for small business and home office environments that never sleep.
- • **Energy-Efficient 5400 RPM:** Optimized rotational speed balances performance with low power consumption, keeping your NAS cool and quiet.
- • **Engineered for 24/7 NAS Use:** Built with NASware firmware to ensure seamless compatibility and rock-solid reliability in multi-bay NAS setups.

## Overview

The WD Red 4TB NAS Internal Hard Drive (WD40EFAX) is purpose-built for small to medium NAS systems with up to 8 bays, delivering reliable 24/7 operation. Featuring a 5400 RPM spindle speed and NASware firmware, it supports a hefty 180TB/year workload rate, ensuring compatibility and endurance in always-on environments. With SATA 6 Gb/s connectivity and a 3-year limited warranty, this drive is the go-to choice for professionals seeking dependable, high-capacity network storage.

## Description

Reliable 24/7 NAS storage with 4TB WD Red drive. Supports up to 180TB/year workload and WD NASware firmware for seamless compatibility and data protection.

## Features

- Specifically designed for use in NAS systems with up to 8 bays
- Supports up to 180 TB/yr workload rate* |Workload Rate is annualized (TB transferred times (8760/recorded power-on hours)), workload rate will vary depending on your hardware and software components and configurations
- NASware firmware for compatibility
- Small and home office NAS systems in a 24/7 environment. 3-year manufacturer's limited warranty
- Note: The always-on environment of a NAS or RAID is a hot one, and desktop drives aren’t typically designed and tested under those conditions like WD Red

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B083XVY99B |
| Best Sellers Rank | 47,784 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 155 in Internal Hard Drives |
| Box Contents | SATA cable, manual |
| Brand | Western Digital |
| Brand Name | Western Digital |
| Cache Memory Installed Size | 256 MB |
| Color | Red |
| Compatible Devices | Desktop |
| Connectivity technology | SATA |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.5 out of 5 stars 12,300 Reviews |
| Data Transfer Rate | 180 Megabits Per Second |
| Digital Storage Capacity | 4 TB |
| Digital storage capacity | 4 TB |
| EU Spare Part Availability Duration | 3 Years |
| Enclosure Material | Information Not Available |
| Form Factor | 2.5 in3.5 in |
| Global Trade Identification Number | 00718037861036 |
| Hard Disk Description | Mechanical Hard Disk |
| Hard Disk Form Factor | 3.5 Centimetres |
| Hard Disk Interface | eSATA |
| Hard Disk Rotational Speed | 5400 RPM |
| Hard disk form factor | 3.5 Centimetres |
| Hard disk interface | eSATA |
| Hard-Drive Size | 4 TB |
| Hardware Connectivity | SATA 6.0 Gb/s |
| Hardware Platform | Mac, PC |
| Installation Type | Internal Hard Drive |
| Item Dimensions L x W x Thickness | 37.4L x 6.7W x 25.8Th centimetres |
| Item Type Name | HDD |
| Item Weight | 560 Grams |
| Manufacturer | Western Digital |
| Manufacturer Part Number | WD40EFAX |
| Media Speed | 22,5 mégaoctets par seconde |
| Model Name | DISQUE DUR WD RED 4TO 64MO CACHE SATAIII *WD40EFAX* (NAS STORAGE) 1036 |
| Model Number | WD40EFAX |
| Network Connectivity Technology | SATA |
| Number of Items | 1 |
| Product Features | Portable |
| Product Warranty | maker |
| Read Speed | 180 Megabytes Per Second |
| Special feature | Portable |
| Specific Uses For Product | Business, Personal |
| UPC | 718037861036 071803786033 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Western Digital
- **Colour:** Red
- **Compatible devices:** Desktop
- **Connectivity technology:** SATA
- **Digital storage capacity:** 4 TB
- **Hard disk description:** Mechanical Hard Disk
- **Hard disk form factor:** 3.5 Centimetres
- **Hard disk interface:** eSATA
- **Installation type:** Internal Hard Drive
- **Special feature:** Portable

## Images

![WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX - Image 1](https://m.media-amazon.com/images/I/710aEelzoRL.jpg)
![WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX - Image 2](https://m.media-amazon.com/images/I/81RWGa9RTrL.jpg)
![WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX - Image 3](https://m.media-amazon.com/images/I/81ne13ZwLEL.jpg)
![WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX - Image 4](https://m.media-amazon.com/images/I/71oQZGjEe4L.jpg)
![WD Red 4TB 3.5 Inch NAS Internal Hard Drive - 5400 RPM - WD40EFAX - Image 5](https://m.media-amazon.com/images/I/813O9B7PBUL.jpg)

## Available Options

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

## Questions & Answers

**Q: Is this a smr or cmr disk?**
A: This is a SMR Drive. 
WD##EFRX is CMR (Good for NAS)
WD##EFAX is SMR (Bad for NAS)

**Q: Why are there two of these on Amazon both exactly the same but different prices? The more expensive one has more reviews.**
A: One is SMR (Shingled Magnetic Recording, the other is not. This SMR version is completely unsuitable for NAS - do not buy it for that purpose. Search online to find the various articles about why SMR technology is entirely improper for NAS, even though Western Digital Red is sold as if it was. WD are being sued in the US to attempt to prevent them doing this - unusually this is not for money but just to block WD so that gives an idea how much of an issue this is. If you have already bought this disk for that purpose, return it and any problems, go down the 'unfit for the purpose for which it was sold/advertised'.

**Q: Is this good for nas running cctv?**
A: I use them in my nas although I do not use cctv I cannot see why they would not be ok.

**Q: The title of the listing of this product says 4tb but in the spec description it is listed as 3tb. which is it?**
A: Re: Western Digital RED NAS Hard Drives
I would be guided by the WD Hard Drive version stated. For Western Digital RED NAS Hard drives
it is currently WDxxEFRX, where xx equals the two digit drive size: eg 30 for 3TB, 40 for a 4TB.
However, for a 12TB it is normally WD120EFAX.
Trust this helps. Regards Ron

## Frequently Bought Together

- Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX
- Synology 2-Bay DiskStation DS224+ (Diskless)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-11-08*