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Western Digital Red 4TB 3.5 inch NAS Hard Disk Drive WD40EFRX

4TB WD Red WD40EFRX, 3.5" NAS HDD, SATA III - 6Gb/s, 5400rpm, 64MB Cache, NCQ

Scan code: LN53298 Manufacturer code: WD40EFRX Request call
Spend over £225 and Buy Now, Pay Later or spread the cost of your finance over 24-48 months with a 10% deposit.
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Delivery options £5.48 By DPD On 22nd Nov 2017 DPD Delivered to your specified address. Receive SMS with one-hour delivery window. £4.79 Collect from local shops UPS and DPD Pickup Collect your parcel from your newsagents, petrol stations and convenience stores. Free Collect Instore Q-Collect Place your order online and collect from our Bolton store with Q-Collect. Weekend, timed and European delivery options are available at checkout ScanProtect protection ScanProtect Protect against installation damage for 28 days.More
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The 4TB WD RED is a high-quality HDD that delivers incredible performance thanks to its easy to use 3.5inch form factor that is just 26.1mm in height, the drive uses IntelliPower. The WD RED HDD's technical highlight is it’s 6Gb/s interface, which is the latest SATA III standard. This drive in particular has a storage capacity of 4TB and has a 64MB Cache with an access time of 2ms.

Network it in RED

Our formula for success at WD has led to the growth of the WD RED making it available in the highest capacities possible. Now up to 8TB, WD offers an even broader, more comprehensive portfolio of NAS solutions for our customers spanning from a total of 1 to 8 bays. This will allow you to store even more data for your home or small business. The WD RED family just got bigger.

Designed for NAS

WD RED is the only hard drive designed for NAS systems that have 1-8 drive bays. The drives are designed and extensively tested for compatibility in the unique 24x7 operating environment and demanding system requirements of home and small office NAS. WD eliminates the confusion. These drives are designed for personal, home, and small business NAS systems up to 8-bays.

NASware Grows to 3.0

Built off of our determination to deliver the best NAS experience, NASware 3.0 extends our promise by further optimizing WD RED for the NAS environment with added support for 6 to 8 NAS bays. WD RED now supports small NAS systems from 1 to 8 bays thanks to NASware 3.0, which further improves drive compatibility and reliability. At 64TB of total capacity in an 8 bay system, WD RED expands your NAS experience.

NAS for Home

Take your connected home environment to the next level with a NAS system that is equipped with WD RED hard drives and enjoy streaming your media, backing up your computers, file sharing and managing your digital content faster and easier. The WD RED NASware 3.0 experience with increased compatibility makes sharing from your mobile device, computer, TV, stereo and more an instant gratification. WD RED enables you to create your own reliable Personal Cloud.

NAS for Business

Increase the efficiency and productivity of your small business with WD RED hard drives for your 1 to 8 bay NAS system. WD RED comes equipped with NASware 3.0, which increases system compatibility allowing for seamless integration with your existing network infrastructure. Add value to your business by enabling your employees to quickly share their files and back up folders reliably with WD RED NAS hard drives. For medium to large business that use up to 16 bay NAS systems, use WD RED Pro.

NAS Compatibility

Advanced firmware technology built into every WD RED drive, NASware 3.0 enables seamless integration, robust data protection and optimal performance for systems operating in NAS and RAID.

The Right Choice

WD RED is designed specifically for home and small office NAS systems and PCs with RAID.

Enhanced Reliability

Since your NAS system is always on, a highly reliable drive is essential. With a 35% MTBF improvement over standard drives, the WD RED drive with NASware 3.0 is designed for the 24x7 environment.

Capacity 4000 GB
Edition WD Red
Form Factor 3.5"
SSHD Flash Memory Size N/A
SSHD Flash Memory Type N/A
Height 26.1 mm
Rotation Speed 5400
Cache 64MB
Access Time N/A
Host to/from Drive Sustained Transfer Rate  
Interface SATA III - 6Gb/s
Load/Unload Cycles  
Annualised Workload Rating  
Non-Recoverable Read Errors per Bits Read  
Max. Operating Shock 30 G
Shock/Free-Fall Sensor No
Dimensions 101.6 x 26.1 x 147 (WxHxD mm)
Package Type OEM

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

36 months
DOA Period:
28 days
RTB Period:
12 months
Manufacturer Contact Details
Customers also bought
4TB WD Red WD40EFRX, 3.5" NAS HDD, SATA III - 6Gb/s, 5400rpm, 64MB Cache, NCQ is rated 4.2 out of 5 by 28.
Rated 5 out of 5 by from Ideal for NAS I fitted two of these drives into my Qnap TS-219 P+ six weeks ago. They are working quietly and faultlessly. They replace two Samsung HD204UI drives which were not as quiet and one of which would from time to time disconnect. from the Qnap. I use them to backup images of my my PC HDD each day using Norton Ghost 15.0.. A weekly master followed by six daily increments. A total of around 296 GB/week.
Date published: 2017-07-17
Rated 4 out of 5 by from First drive failed - replacement OK This disk was purchased as an additional disk in a WD MyCloud server. The first supplied disk was DoA. It was quickly replaced and the replacement is still performing well after 2 weeks.
Date published: 2017-02-28
Rated 5 out of 5 by from Great Drives at a good price I ordered 2 of these drives to add to a Synology DS216 Play. WD Red drives are excellent & well suited to NAS devices. They were quickly dispatched by Scan however I have 2 issues. 1) The drives were not that well packaged, only wrapped in bubble wrap. 2) The drives I received were OEM (Out of Region) drives, nowhere on the Scan website is this stated. Had I known this I would not have purchased from Scan.
Date published: 2016-09-29
Rated 5 out of 5 by from Good product for SOHO NAS enclosures Not the cheapest drive, but worth the modest premium for the good reliability. I have about 10 of these, bought over a period of time, with no drive failures to date. All drives fail eventually but these ones give a good lifetime of the money.
Date published: 2016-09-27
Rated 5 out of 5 by from Good Value Received in good time and good order. Drive worked first time. Good price per gig.
Date published: 2016-07-03
Rated 5 out of 5 by from Does what it says on the tin I am not really qualified to write a review on a hard disc form a technical point of view. As a user however the discs (I bought 2) arrived safely packaged. They were easy to fit and setting up the NAS drive I bought them for could not really have been easier. I am very satisfied and would buy them again given the requirement. The NAS drive is easy to use and is the second QNAP NAS system I have bought. The first one has run reliably for many years and lived through the dust of a house renovation. I wanted to double up on my back up strategy so I have now bought the second one and I am very pleased with it.
Date published: 2016-05-31
Rated 5 out of 5 by from Good - don't forget to order cable! I'm very happy with the drive - no problems fitting it in my Chillblast PC or using it. I should have ordered a SATA 3.0 cable at the same time but I managed to get one from the local Maplin shop.
Date published: 2016-05-04
Rated 5 out of 5 by from Does what it should. It's a hard drive. Speeds seem decent. Can't comment on reliability yet.
Date published: 2016-03-22
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Questions & Answers


The warranty on this is listed as 24 months, however the warranty on the Western Digital Website, as well as for the WD30EFRX (3TB version) is listed as 36 months. Is this a mistake ?
Asked by: kraven
From the product link this is the information under warranty: Duration: 36 months Type: Direct DOA Period: 28 days RTB Period: 12 months I hope this helps.
Answered by: Phill
Date published: 2015-07-17

Are these the new NASAware 2.0 versions?

Asked by: ewmanning
I believe these are the new NASAware 2.0 version drives as it does say on the products link. If there is a way of testing this, I will if you want and I can report back. I hope this helps.
Answered by: Phill
Date published: 2015-07-17
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Western Digital Red 4TB 3.5 inch NAS Hard Disk Drive WD40EFRX
Western Digital Red 4TB 3.5 inch NAS Hard Disk Drive WD40EFRX