Brand | Western Digital |
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Product Dimensions | 10.2 x 14.7 x 2.6 cm; 300 g |
Item model number | WDBMMA0040HNC-ERSN |
Manufacturer | Western Digital |
Series | WD RED DESKTOP NAS 4TB 5400 64MB 6Gb/s EMEA Retail Kit |
Colour | Red |
Form Factor | 3.5-inch |
Processor Type | Others |
Hard Drive Size | 4 TB |
Hard Disk Description | Mechanical Hard Disk |
Hard Drive Interface | Serial ATA-600 |
Hard Disk Rotational Speed | 5400 RPM |
Wattage | 3600 watts |
Power Source | Hand-operated |
Hardware Platform | PC |
Are Batteries Included | No |
Item Weight | 300 g |
Guaranteed software updates until | unknown |
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WD Red 4TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, SMR, 256MB Cache
We don't know when or if this item will be back in stock.
Digital storage capacity | 4 TB |
Hard disk interface | Serial ATA-600 |
Connectivity technology | SATA |
Brand | Western Digital |
Special feature | IntelliPower |
Hard disk form factor | 3.5 Inches |
Hard disk description | Mechanical Hard Disk |
Compatible devices | Desktop |
Installation type | Internal Hard Drive |
Colour | Red |
About this item
- Target audience: Prosumer, SOHO and workgroups or users who want to enjoy streaming media, backing up PCs, file sharing and managing digital content quickly and easily
- Designed and tested for personal/home/small office 1-8 bay NAS environments. For larger applications, please use WD red pro hard drives
- Built for up to 8-bay NAS systems and up to 10 TB capacities, for larger systems please use red pro drives
- NASware (TM) technology which optimises the hard drive for 24 x 7 NAS environments and improves reliability within NAS systems
- Most extensive NAS partner compatibility-testing list available on the market (as of March 2016)
- Before the users are starting to use the disk: do run a full surface test on it and if this test is passed then it will means the disk is OK
Top Brand
Western Digital

93% positive ratings from 1K+ customers

10K+ recent orders from this brand
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From the manufacturer


For Personal or Home Office
Stream, backup, share, and organise your digital content at home with a NAS and WD Red drives designed to effortlessly share content with the devices in your personal or home office environments. NASware 3.0 technology increases your drives’ compatibility with your existing network and devices, TV, stereo, and more. Live in a connected world.


Exclusive NASware 3.0
Built into every WD Red hard drive, NASware 3.0’s advanced technology improves your system’s storage performance by increasing compatibility, integration, upgradeability, and reliability.
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24/7 Environment
Since your NAS system is always on, a reliable drive is essential. With an MTBF of up to 1 million hours, the WD Red drive is engineered to tackle 24/7 environments.
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Cooler operations and enhanced reliability
By reducing power consumption, the operating temperature of your NAS stays cool. With a lower temperature in your system, you can create a more reliable solution for your NAS.
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The Power of Red comes to SSD
Boost your NAS system’s performance and responsiveness with the WD Red SA500 NAS SATA SSD. Unlike standard SSDs, WD Red NAS SATA SSDs are purpose built for endurance and efficient caching.
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Step up to enterprise-class performance
Specifically designed for use in enterprise-class storage systems and data centers, the WD Gold Enterprise Class HDD delivers the world-class performance you expect from Western Digital hard drives.
SMR | Recording Technology | CMR |
Up to 8 Bay Systems | NAS Bay Support | Up to 8 Bay Systems |
5400 | RPM Class | 5400 |
up to 6TB | Capacity | up to 14TB |
| RAID Support | |
180TB / year | Workload Rate | 300TB / year |
1M hours | MTBF | 1M hours |
SMR | Recording Technology | CMR |
Up to 8 Bay Systems | NAS Bay Support | Up to 24 Bay Systems |
5400 | RPM Class | 7200 |
up to 6TB | Capacity | up to 18TB |
| RAID Support | |
180TB / year | Workload Rate | 300TB / year |
1M hours | MTBF | 1M hours |
Compare with similar items
This item ![]() WD Red 4TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, SMR, 256MB Cache | Recommendations | |||
Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | Try again! Added to Basket spCSRF_Treatment Add to Basket | ||
Price | Currently unavailable. | £92.99£92.99 | -5% £109.90£109.90 RRP: £116.18 | -25% £100.99£100.99 Was: £134.99 |
Delivery | — | Get it as soon as Wednesday, May 14 | FREE delivery | Get it 13 – 14 May |
Customer Ratings | ||||
Sold by | — | Amazon | Azm_Store | FASHION MY LOVE |
storage capacity | 4 TB | 4 TB | 4 TB | 4000 GB |
hardware interface | sata 6 0 gb | sata 6 0 gb | sata 6 0 gb | sata 6 0 gb |
compatible devices | Desktop | Desktop, Laptop | Desktop | Desktop |
form factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
write speed | 50 megabytes per second | 180 | 1 mégaoctet par seconde | 0,00 |
Product information
Technical Details
Additional Information
ASIN | B00HRNYXL0 |
---|---|
Customer Reviews |
4.5 out of 5 stars |
Best Sellers Rank | 113,402 in Computers & Accessories (See Top 100 in Computers & Accessories) 343 in Internal Hard Drives |
Date First Available | 15 Jan. 2014 |
Warranty & Support
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WD Red 4TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, SMR, 256MB Cache
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Customer reviews
Customer Reviews, including Product Star Ratings, help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the hard drive performs well with Synology systems and appreciate its NAS capabilities, with one customer noting it has run error-free for 3.5 years. The drive offers good value for money, comes with lots of storage space, and is easy to install. While some customers find it very quiet, others report a constant high-pitched whistle. Customers disagree on the drive's reliability, with some reporting failures after 15 months of use.
AI-generated from the text of customer reviews
Customers report that the hard drive performs perfectly and works well with Synology systems, with one customer noting it has run error-free for 3.5 years.
"...I was able to hot-swap it easily in my 4-bay QNAP home server. No issues at all...." Read more
"...They are reliable, perform well and have survived the test of time. For now, I only use this specific model given my experience...." Read more
"Work well enough. Stop spinning when not used. "boot up" in <5s." Read more
"...However, it is operating perfectly, and I am not expecting any reliability issues in the future." Read more
Customers are satisfied with the drive quality, describing it as an excellent NAS drive.
"Nice new 4TB external disk to replace a faulty 10-year old 3TB. I was able to hot-swap it easily in my 4-bay QNAP home server. No issues at all...." Read more
"...the game a long time and have a fine tradition of producing fast, quality drives backed up by superb warranty..." Read more
"...When I spoke to Amazon customer care on the 2 occasions about the faulty drives, all I was offered were refunds not replacements which I still..." Read more
"...WD RED PLUS are CMR conventional tracks, these are the better drives for a rock solid NAS...." Read more
Customers find the hard drive offers good value for money.
"...on customers reviews in server use and this drive was the best price for the TB I could find." Read more
"...you buy because it is the warranty support that makes this a valuable drive." Read more
"...2 of these drives (6tb WD60EFAX) as, at the time, they seemed like a good deal but after some further research from comments I had since reading on..." Read more
"Bought this for my NAS and works like a dream. Very expensive and you lose over 1TB of space due to how WD calculate data space...." Read more
Customers find the hard drive performs well, with one customer noting that it spins up quickly from idle.
"...of speed, they wake up from sleep in about 2-3 secs, and transfer data fast enough for my needs which is mainly archiving RAW files...." Read more
"...It and the WD Red are performing perfectly, no lag, no heat or noise issues...." Read more
"...The NAS slowed down to a crawl, directory listings would hang, the UI became unresponsive and I had no access to my data...." Read more
"...not something where access speed is critical - but it's not a slow drive!" Read more
Customers find the hard drive easy to install.
"...Installation was a breeze, the DS215j did all the work and had them up and running in moments. So far I've not had a problem with these drives...." Read more
"I really like WD drives for my QNap, really easy to install slide old one out put new one in and away it goes and rebuilds itself...." Read more
"...have now discovered this is an SMR not CMR drive, and SMR causes compatibility issues with NAS...." Read more
"...Installing the new drives was simple and straightforward and went through with no hitches...." Read more
Customers appreciate the hard drive's storage capacity, noting it's designed for NAS use and has 6TB of space. One customer mentions successfully fitting four drives in a NAS box.
"...So far I have been able to backup the files from my older NAS without any issue and additional files from my network...." Read more
"...Very quiet, efficient drives and perfect for NAS or PC storage." Read more
"Designed for NAS storage and an excellent warranty support but make sure you read the small print - this particular unit is supported by WD support..." Read more
"...Seagate Barracuda XT drive, the drive has a decent capacity but its noisier than the..." Read more
Customers have mixed experiences with the hard drive's noise level, with some finding it very quiet while others report noticeable rattle sounds and a constant high-pitched whistle.
"...They're reliable, no temperature issues and practically silent in operation...." Read more
"...It and the WD Red are performing perfectly, no lag, no heat or noise issues...." Read more
"...There is a noticeable rattle sound when the drive is in read/write operation, whereas the other drive is silent...." Read more
"...I have had 2 WD RED CMR older drives in a 2 Bay NAS for over 6 years, quiet and faultless...." Read more
Customers have mixed experiences with the hard drive's reliability, with some finding it solid while others report it failing after 15 months of use.
"...I always choose the Red Plus given the constant use and the longevity...." Read more
"...reported no usage on the drive, so the issue must have been a manufacturing fault...." Read more
"...They are reliable, perform well and have survived the test of time. For now, I only use this specific model given my experience...." Read more
"...UPDATE: the second drive has now failed (growing number of bad sectors) on the second anniversary of purchase...." Read more
Reviews with images

WD RED Plus are CMR Drives best for NAS
Top reviews from United Kingdom
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- Reviewed in the United Kingdom on 4 April 2024Capacity: 4TBStyle Name: Red PlusVerified PurchaseNice new 4TB external disk to replace a faulty 10-year old 3TB. I was able to hot-swap it easily in my 4-bay QNAP home server. No issues at all. I always choose the Red Plus given the constant use and the longevity. Arrived promptly via Royal Mail Tracked and well-packaged in a ton of bubble wrap. Exactly what I needed.
- Reviewed in the United Kingdom on 2 October 2023Capacity: 6TBStyle Name: Red ProVerified PurchaseI have of these 24 drives in a NAS that has been running for 15-9 years, and have to say they have been very reliable to date. In that time, I've only needed to replace a small number of drives, well below what I was expecting (I still have a number of 15 year old drives), despite having them in a location that in the summer should ideally be much cooler. They are reliable, perform well and have survived the test of time.
For now, I only use this specific model given my experience. There may be other makes and models that work just as well, however I have been happy with the Red Pros to date, especially for a small office NAS solution. I just wish that after all this time, their prices would have reduced more significantly ;-).
- Reviewed in the United Kingdom on 18 October 2024Capacity: 4TBStyle Name: Red PlusVerified PurchaseWork well enough. Stop spinning when not used. "boot up" in <5s.
- Reviewed in the United Kingdom on 2 November 2022Capacity: 18TBStyle Name: Red ProVerified PurchaseIt definitely seems to sound louder than an identical WD Pro 18tb I purchased 3 weeks ago for some reason.
There is a noticeable rattle sound when the drive is in read/write operation, whereas the other drive is silent. Installed in a PC case it is not so audible.
However, it is operating perfectly, and I am not expecting any reliability issues in the future.
- Reviewed in the United Kingdom on 4 September 2016When it comes to mechanical hard drives, you can't get much better then Western Digital, they've been in the game a long time and have a fine tradition of producing fast, quality drives backed up by superb warranty (although I've heard that it's no longer for 5yrs). I've had Maxtor and Seagate drives but since buying a WD Caviar Black, then two WD 10,000 rpm VelociRaptors, I haven't looked back. I bought a pair of WD Red 3TB NAS drives almost 2 years ago to compliment the Synology DS215j. Incidentally, they show up as 2.68TB when installed! I'm no techie but I know that it's not unusual for hard drive capacity to be less than marketed for some obscure technical reason.
Although OEM, the drives arrived properly packed and in sealed anti-static bags. Installation was a breeze, the DS215j did all the work and had them up and running in moments. So far I've not had a problem with these drives. They're reliable, no temperature issues and practically silent in operation. In terms of speed, they wake up from sleep in about 2-3 secs, and transfer data fast enough for my needs which is mainly archiving RAW files. I'm very happy with them and chances are you will be too.
- Reviewed in the United Kingdom on 22 September 2021Capacity: 4TBStyle Name: Red PlusVerified PurchaseI am running four of these drives in my PC connected to an Adaptec RAID controller. As these drives spin a little bit slower I was expecting transfer rates to suffer, but I was pleasantly surprised by how fast these drives are.
And so far, they work as a RAID array flawlessly.
The four I have are installed in a Silverstone four drive hot-swap bay at the front of my computer and I can barely hear them.
I was so impressed with them that I have just purchased another four of them to expand my RAID array even further.
UPDATE. I bought another four of these drives (as mentioned above) and one of them was Dead on Arrival. The system can see it, but it is reported as being 0GB in size with 0GB free space. I have tried this faulty drive on two separate hard drive controllers and get the same result. This isn't the first time I have had a drive turn up dead on arrival but it is very rare.
- Reviewed in the United Kingdom on 28 May 2017Capacity: 6TBStyle Name: RedVerified PurchaseI figured the Red 6TB NAS hard disk was best for price vs. storage size. I opted for the retail box over the OEM, as the retail packaging would give more protection over the OEM (though hard drive packaging has improved over the years). Wasn't a lot more expensive.
It's currently taking up one bay in a TerraMaster F2-220 2-Bay NAS Drive Enclosure. It and the WD Red are performing perfectly, no lag, no heat or noise issues. It has replaced and consolidated data spread over three Samsung 2TB and one Seagate 4TB drive, all of which are working perfectly, yet none of which had been backed up.
Now all I need to do is save up for another 6TB, 'cos that's an awful lot of eggs in one basket at the moment.
Top reviews from other countries
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Wissensjunkie ;o)Reviewed in Germany on 6 June 2021
1.0 out of 5 stars Laut und Instabil
Capacity: 10TBStyle Name: Red ProVerified PurchaseDie Festplatte Red Pro kam gut und sicher verpackt. Erwartet hätte ich entweder eine EFAX oder eine ESRN. Geliefert wurde eine eher laute Festplatte WD102KFBX (lauter als die bestehenden WD Red Platten im gleichen System). Beim Start zeigte mir mein System sofort Instabilität für diese Festplatte an. Zwei Gründe nicht länger nach der Ursache zu suchen. Die Festplatte geht zurück.
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DavidReviewed in Spain on 4 July 2022
1.0 out of 5 stars Que falla
Capacity: 2TBStyle Name: Red PlusVerified PurchaseComprado en septiembre y ha pegado en junio….
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Armando S.Reviewed in Spain on 18 October 2022
5.0 out of 5 stars Bom preço, rápido e bastante silencioso.
Capacity: 14TBStyle Name: Red PlusVerified PurchaseComprei 3 WD Red Plus de 14 TB para um NAS QNAP e estou bastante satisfeito com esta aquisição. Coloquei pastilhas espessas de feltro nos apoios do NAS (para reduzir a transmissão de vibrações) e este é praticamente inaudível no compartimento em que está colocado.
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Adem S.Reviewed in Turkey on 27 July 2023
5.0 out of 5 stars kalıteli bir HDD. tavsıye ederım.
Capacity: 14TBStyle Name: Red PlusVerified Purchasekalıteli bir HDD. tavsıye ederım.
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P. SeniorReviewed in Spain on 20 February 2022
5.0 out of 5 stars Fiable
Capacity: 4TBStyle Name: Red PlusVerified PurchaseHan llegado en su paquete original y sellado. Lo s he montado en un Synology DS220+, hacen un poco de ruido mientras copiando muchos datos, pero en el uso diario sale muy poco ruido. Parecen fiables, después de un mes de uso todo bien.