Search  for anything...
Western Digital

Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX

Based on 12,136 reviews
Condition: New
Checking for the best price...
$140.00

Buy Now, Pay Later

As low as $23.33 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Returnable until Jan 31, 2025

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: 20 left in stock
Fulfilled by CorteseInc
Arrives Sunday, Nov 8
Order within 14 hours and 43 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

Recently Viewed

At a glance

Condition
New
Capacity
4TB
Style
Red
Pattern
Hard Drive
Model
WD40EFAX
Storage
4 TB
Weight
1.5 lb
In the box
Internal HDD
Works with
Storage System

Features 6

  • Available in capacities ranging from 2-6TB with support for up to 8 bays
  • 5400RPM performance class
  • NASware firmware for compatibility
  • NAS systems with daily workloads associated with personal and home office environments and idle time available to perform necessary background operations

Description

There’s a leading edge WD Red drive for every compatible NAS system to store your precious data. With drives up to 6TB, WD Red offers a wide array of storage for customers looking to build a NAS solution. Built and tested for personal and home NAS systems with up to 8-bays, these drives pack all the punch you need in one powerhouse unit for storing, archiving, and sharing. With WD RedTM, you’re ready for what’s next.

Specs 31

Digital Storage Capacity 4 TB
Hard Disk Interface Serial ATA-600
Connectivity Technology SATA
Brand Western Digital
Special Feature Portable
Hard Disk Form Factor 3.5 Inches
Hard Disk Description Mechanical Hard Disk
Installation Type Internal Hard Drive

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Nov 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.

The WD Red NAS Hard Drive is highly praised for its extensive lifespan and exceptional reliability. Designed for continuous operation, these drives measure up to 4 TB in storage and are reported to install seamlessly into NAS devices. Some users remark that they have used them round-the-clock for over five years without issues. However, one criticism is that the 1-4TB sizes are SMR drives, which some feel is less suitable for RAID systems.

Pros

  • 👍 Exceptional longevity and reliability
  • 💾 High storage capacity (up to 4TB)
  • 🔄 Operates continuously without issue
  • 🔌 Installs seamlessly into NAS devices

Cons

  • 🔻 Low suitability for RAID systems due to being SMR drives
  • 👎 Some users feel that their life-span is shorter than they should be

Should I Buy It?

Yes, the WD Red NAS Hard Drive is highly recommended for its impressive durability, seamless installation, and extensive storage capacity. Those planning to use them in a RAID system, however, should note they are SMR and not CMR drives.

Good for our movie collection
Capacity: 6TB Style: Red Pattern: Hard Drive
We needed a place to store our movie collection and these fit the bill. We set up a NAS program with these and they work well. Very pleased.
Reviewed in the United States on October 23, 2024 by Deb
Western Digital NAS Hard Drive
Capacity: 2TB Style: Red Pattern: Hard Drive
This is not your average Western Digital desktop hard drive. The WD Reds are made for heavy duty, high duty cycle use. They are made for use in Network Attached Storage devices. The NAS environment can really torture a hard drive. Especially when it has to support a lot of users and devices. This hard drive is made to be able to function in such an environment. I have a Terramaster NAS in my home network. That system has two Seagate Ironwolf hard drives. It has been flawless in operation. I attached an external hard drive enclosure to the Terramaster to have a backup of all the data. The hard drive enclosure does not come with its own hard drive. You get to choose, depending on your needs. I bought this WD Red hard drive to use as the backup for the Terramaster. I backup the data from the NAS on this hard drive and then store the drive in a safe location. The WD Red has been flawless. It is easily the equivalent of the Seagate Ironwolf. The operation is silent and reliable. I have not had any issues with these NAS hard drives. Yes you can use a regular desktop hard drive for this purpose. A WD Blue caviar hard drive will also work. However, the WD Red is a more robust hard drive. It is more expensive than a regular desktop hard drive. But the reliability and peace of mind are worth it. NAS hard drives will also work on your desktop computer. You can swap out your WD Blue hard drive for this one. You will get added durability and dependability. But it will only be worth the extra cost if your computer is regularly stressed. A one-user desktop PC that gets used for 5 hours per day is not under stress. However, if you have a PC that is used for security monitoring purposes or as a home server, then yes, invest in a more robust hard drive. I love solid state hard drives for their performance and lighter weight when used on a laptop. However, for storage purposes, I still prefer a mechanical hard drive. If I were building my own desktop PC, yes, I would use a NAS hard drive such as the WD Red. But I would not throw out a working WD Blue that comes with a new PC. Evaluate your needs carefully. A data storage system used in a business setting should have robust hard drives. If you are a content creator on Youtube, get at least a four bay NAS storage device and fill those drive bays with WD Reds or Seagate Ironwolves. If you surf the internet, shop online, and basically only consume social media, then a regular PC with a traditional desktop hard drive will be good enough. Highly recommended for NAS Storage systems and heavy-duty desktop use. ... show more
Reviewed in the United States on August 30, 2020 by citan-uzuki
Big
Capacity: 4TB Style: Red Pattern: Hard Drive
Dats
Reviewed in the United States on October 31, 2024 by SRE
great
Capacity: 6TB Style: Red Pattern: Hard Drive
WORKHORSE
Reviewed in the United States on October 29, 2024 by John anderson
Returns are risky
Capacity: 4TB Style: Red Pattern: Hard Drive
I bought 4 of these to put into a 5 bay drive. I'm using them as a RAID 5 and it's been running continuously for a couple of months now. I've had no problems. I looked into buying used Hitachi drives, but I decided it wasn't worth the time and money to buy used hard drives. You never know what you'll get. I've been very happy with these. _____________________ It's now almost 2 years since I ordered 4 of these for a RAID 5 array. One of them has failed. It's the first WD drive that I can remember failing on me, and I've been using them for years. WD has agreed to honor the warranty (they were warranted for 3 years). The problem is that the drive failed in a way that it can't be reformatted. In order to make useless any data on the hard disk platters my only option is to physically destroy them. But then WD won't honor the warranty if there is physical damage to the drive. They assured me that the disk would be reformatted. BUT, in a previous, unrelated order from Amazon in 2020, I received a "new" WD drive. In preparing that drive for use I discovered that it had already been formatted and there were several Word files on it from the former owner. Some of the files were immigration forms containing personal information. In light of this knowledge, I asked WD if I could drill holes through the platters before sending them in. The reply was a quick "No, physically damaged disks aren't covered under the warranty". My only 2 choices were to keep the disk and destroy it myself, or return it for a replacement and hope that WD follows up and re-formats it. I chose to keep it and eat the loss. I think that WD should formulate a better policy for situations like this, and that's why I've given them a 4 star rating instead of 5. ... show more
Reviewed in the United States on June 13, 2021 by tokyodj
How it works
Checking for best price...