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

4.5 4.5 out of 5 stars 11,907 ratings
$140.90
4TB
Red
Hard Drive
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Purchase options and add-ons

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
Compatible Devices Storage System
Installation Type Internal Hard Drive
Color Red

About this item

  • 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
  • Supports up to 180 TB/yr Workload Rate Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred ✕ (8760 / recorded power-on hours))
  • 3-year limited warranty

Buy this product as Renewed and save $61.91 off the current New price.

WD Red 4TB NAS Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX (Renewed)
WD Red 4TB NAS Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX (Renewed) $78.99 & FREE Shipping. Details
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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
$143.90
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Synology 2-Bay NAS DS223 (Diskless)
$249.99
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Price$143.90-17% $99.99
List: $119.99		$82.99$301.15$179.93-11% $168.60
List: $189.99
Delivery
Get it May 13 - 21
Get it as soon as Sunday, May 12
Get it as soon as Monday, May 13
—
—
Get it as soon as Sunday, May 12
Customer Ratings
4.54.5 out of 5 stars11,907
4.64.6 out of 5 stars9,030
4.64.6 out of 5 stars54,492
4.54.5 out of 5 stars1,695
4.64.6 out of 5 stars969
4.64.6 out of 5 stars9,030
Easy to install
4.4
4.5
4.6
4.3
4.7
4.5
Storage Capacity
4.3
4.6
4.5
4.4
4.6
4.6
Noise level
4.3
4.3
4.4
3.6
4.0
4.3
Value for money
3.4
4.2
—
3.8
4.2
4.2
Durability
3.5
—
4.4
4.4
—
—
Sold By
Nationwide Tech Biz
Amazon.com
Amazon.com
Amazon.com
Giz-Promo
Amazon.com
storage capacity
4 TB
0 TB
4 TB
2000 GB
8000 GB
8000 GB
hardware interface
sata 6 0 gb
sata 6 0 gb
sata 6 0 gb
sata 6 0 gb
sata 6 0 gb
sata 6 0 gb
compatible devices
Storage System
NAS System
Laptop, Desktop
Nas Enclosure
NAS Server
NAS Server
form factor
2.5 in|3.5 in
3.5-inch
3.5-inch
3.5-inch
3.5-inch
3.5-inch

What's in the box

  • Internal HDD

    • From the manufacturer

    For Personal or Home Office

    Stream, backup, share, and organize 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.

    WD Red

    Compare and Upgrade HDDs

    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 22TB

    RAID support

    180TB / year

    Workload Rate

    300TB / year

    1M hours

    MTBF

    1M hours

    Learn More
    Learn More

    Product information

    Technical Details

    Collapse all
    Summary
    Other Technical Details

    Additional Information

    Warranty & Support

    Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
    Product Warranty: For warranty information about this product, please click here

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

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    Product 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.

    Product guides and documents

    User Manual (PDF)
    User Guide (PDF)

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    11,907 global ratings

    Customers say

    Customers like the value of the hard drive, saying it's the best for the price. They're also satisfied with the storage space and ease of installation. However, some customers have reported compatibility issues with the drive being unsuitable for NAS setups. Opinions are mixed on quality, performance, noise, and errors.

    AI-generated from the text of customer reviews

    48 customers mention41 positive7 negative

    Customers like the value of the computer drive. They say it's the best for the price, better value than using SSD drives, and cheap enough that you don't need the cloud.

    "...Nuff said. Decent performance, great price (now; not so much so in 2013.) Hot-swaps cleanly and effortlessly.Bad: Nothing significant...." Read more

    "Great product, only downside is, it will fail...." Read more

    "...They are also a better value than using SSD drives...." Read more

    "...I then used it for my pc, just to try it out. Works awesome, and at a good price." Read more

    29 customers mention26 positive3 negative

    Customers like the storage space of the hard drive. They say it's great for storing NAS data, download videos, and documents. They also say it does a great job of storing photos and videos. Customers also mention that the price per TB keeps dropping.

    "...They are made for use in Network Attached Storage devices. The NAS environment can really torture a hard drive...." Read more

    "...This does a great job of storing documents, photos, and videos." Read more

    "...They play via the NAS to multiple Plex servers. They contain over 15 thousand video files...." Read more

    "I did a LOT of research and this was the best drive for storage. Low rpm = less heat = longer lifespan...." Read more

    27 customers mention24 positive3 negative

    Customers like how easy it is to install the computer drive. They say the technology just goes together so easily, and there are no issues during setup. Some say the procedure was painless, and the drive was recognized right away.

    "...Replacing the drive in Tivo Roamio is extremely easy...." Read more

    "I bought 2 and plugged them into my NAS. installing them was easy. Setting up the NAS was more frustrating." Read more

    "Working great, easy to install. Using it as a backup drive." Read more

    "Got 4 of these for my new Asustor NAS. They were recognized right away, and I was easily able to create a RAID 5 volume...." Read more

    199 customers mention65 positive134 negative

    Customers are mixed about the quality of the computer drive. Some mention that they are dependable, reliable, and long lasting, with a good quality component standard. However, others say that theirs failed after two years, died in six months of mild usage, and developed a bad sector after 1,500 days of being online.

    "...Hot-swaps cleanly and effortlessly.Bad: Nothing significant. Five stars." Read more

    "...You will get added durability and dependability. But it will only be worth the extra cost if your computer is regularly stressed...." Read more

    "...Unfortunately, it's been done in a very stupid way. After 3 years of runtime hours, a warning will pop up telling you to replace the drive...." Read more

    "...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...." Read more

    177 customers mention96 positive81 negative

    Customers are mixed about the performance of the hard drive. Some mention that it works extremely well, is functional, and runs well in their NAS. However, others say that it is a slower drive than the regular WD Red drives and starts having performance problems. They also mention that there is lag when choosing a recorded show and that it may damage some files.

    "...Nuff said. Decent performance, great price (now; not so much so in 2013.) Hot-swaps cleanly and effortlessly.Bad: Nothing significant...." Read more

    "This SMR drive will not work with Tivo...." Read more

    "...That system has two Seagate Ironwolf hard drives. It has been flawless in operation...." Read more

    "...Idle time is CRITICAL or the drive will not function properly...." Read more

    49 customers mention31 positive18 negative

    Customers are mixed about the noise of the computer drive. Some mention that it's very quiet and reliable, while others say that it makes the most god awful noise when it spins down. Some customers also mention that the read heads started beeping.

    "...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...." Read more

    "...The read heads started beeping: beep-beep, 7 second silence, beep-beep, it repeats endlessly. This is the read heads refusing to unlock...." Read more

    "...They're quiet and running just fine so far. Speeds are great, everything I could hope for...." Read more

    "...So far, very quiet and no issues at all." Read more

    32 customers mention14 positive18 negative

    Customers are mixed about the errors. Some mention that the NAS reports them to have no errors or issues, while others say that the drive has reported errors and the NSA will reject the drive.

    "...Thought it could be a fluke, but sure enough, the errors popped back up near 85% for the resilver...." Read more

    "...So far, very quiet and no issues at all." Read more

    "Drive is failed when arrive. Constant parity errors." Read more

    "...So far it’s 90% with no errors.... 18 days up and healthy." Read more

    65 customers mention5 positive60 negative

    Customers are dissatisfied with the compatibility of the computer drive. They say that it's not suitable for NAS, and that it uses SMR, which is inappropriate for RAID based NAS setups. Some customers also mention that the drive is no longer compatible.

    "...These drives are SMR, which renders them useless for NAS...." Read more

    "...a slower drive than the regular WD Red drives, and it is not on the compatibility list for use in Synology NAS...." Read more

    "...use an inferior writing technique on these drives that is not well suited for NAS use (SMR)...." Read more

    "Not on the approved device list, but works fine in my Synology DS216+II...." Read more

    Buyer beware - These are NOT NAS drives!
    1 Star
    Buyer beware - These are NOT NAS drives!
    Would give zero stars if I could. Purchased these drives because they are labeled as NAS drives, but if you look closely you'll also see "SMR" in the description, which sadly meant nothing to me until it was too late. SMR drives are NOT up to the demands of a modern NAS, unless you barely use the thing. As such, I would say the description is misleading at best.I purchased two of these drives brand new in June and ran them in a hybrid-RAID configuration. Less than 4 months later, one of the drives started having I/O timeout errors. Went to do a deep scan on it and the drive suddenly failed completely. Return window closed in July. What a joke. A 30-day return window on something that should last years?The other drive might still be good, might not. I'm not taking the chance. Don't let the low price tag lure you in like it did me. Choose another brand.
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    Top reviews from the United States

    Rich H.
    5.0 out of 5 stars Does the job; great price
    Reviewed in the United States on September 11, 2023
    Capacity: 3TBStyle: RedPattern: Hard DriveVerified Purchase
    Good: This is the first Red I've had to replace in my NAS array in almost *ten years* of 24/7 operation. 'Nuff said. Decent performance, great price (now; not so much so in 2013.) Hot-swaps cleanly and effortlessly.

    Bad: Nothing significant. Five stars.
    Helpful
     Report
    citan-uzuki
    5.0 out of 5 stars Western Digital NAS Hard Drive
    Reviewed in the United States on August 30, 2020
    Capacity: 2TBStyle: RedPattern: Hard DriveVerified Purchase
    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.
    11 people found this helpful
    Helpful
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    Collin M.
    5.0 out of 5 stars Great Drives for Upgraded NAS
    Reviewed in the United States on October 26, 2023
    Capacity: 4TBStyle: RedPattern: Hard DriveVerified Purchase
    I had a NAS server with x2 2TB WD Reds in it, and I was looking to upgrade, as I was reaching capacity. These have been fantastic so far. They're holding up well, and the transfer from the old drives to the new ones was relatively quick given the amount of data that was on there. Shipping hard drives can be tricky, but they were packaged well and very protected. They also are both functional, so I didn't receive any duds, which is wonderful. They're quiet and running just fine so far. Speeds are great, everything I could hope for. WD drives have always treated me well, and I am more than happy with these. Crossing my fingers that they will last me a nice long time with the upgrade! Highly recommended!
    One person found this helpful
    Helpful
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    jsimo1
    5.0 out of 5 stars Not Compatible with Tivo Roamio
    Reviewed in the United States on June 25, 2023
    Capacity: 2TBStyle: RedPattern: Hard DriveVerified Purchase
    This SMR drive will not work with Tivo. The Western Digital 2TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 128 MB Cache, 3.5" -WD20EFZXk is compatible with the Tivo Roamio
    2 people found this helpful
    Helpful
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    hummedan
    4.0 out of 5 stars Failed 3 years and 2 months after install
    Reviewed in the United States on February 28, 2024
    Capacity: 4TBStyle: RedPattern: Hard DriveVerified Purchase
    I installed 4 of these into my Synology NAS. I have had one of the four fail 3 years and and 2 months after install. The warranty is 3 years (wah wah).

    This is the first failure that I have had with these drives. Luckily it is in a RAID config in the NAS so no data has been lost.
    Helpful
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    Wayne Tibbit
    5.0 out of 5 stars Used to Easily Replace Failed Drive in Tivo Roamio
    Reviewed in the United States on November 20, 2019
    Capacity: 2TBStyle: RedPattern: Hard DriveVerified Purchase
    I considered throwing away my six year old Roamio, model 846500, when it failed. The Tivo wouldn't get past the "Welcome" screen. I fixed the failure in less than an hour with only this WD20EFAX drive, and now have four times the storage as a bonus. The internet knowledge base (and the Weaknees company that's probably the best third party support company for Tivo) says that this failure mode is almost always caused by a failed hard drive. They also recommend this particular model replacement drive. Replacing the drive in Tivo Roamio is extremely easy. It's easy both both physically and because this Tivo will automatically format a new drive (as long as the drive size is 3TB or less) and automatically load all the required Tivo software during boot up. You will, unfortunately, lose any recordings and such drive-kept data as channel lists, scheduled recordings and One-Passes, and so on that were on the old failed drive. There are plenty of decent videos on the internet to show how to do this, but here is a quick procedure to give you an idea of how easy it is: Remove two torx head screws in the back of the unit and use a thin blade such as a common dinner knife to carefully pry up the top of the box. Remove three torx screws that attach the drive's adapter rails to the box and disconnect the drive's data/power cable by pulling the connector away from the drive. Remove the drive mounting rails from each side of the drive, noting their original position, by removing the two torx screws connecting each rail to the drive. Using the new drive, put everything back together. Reconnect the Tivo to your TV system, plugging in the power cable last. Plug in the Tivo's power and let the system boot up. Be patient because it will take some time for the Tivo to automatically format the drive and load all the software needed. Follow the screen guide to set up the Tivo as for a new unit. Your current account with Tivo and any monthly or All-In programming are still in place because the account is based on the box'es ID number which is stored on Tivo's motherboard rather than its hard drive. Voila...You just saved yourself the cost of a new Tivo and upgraded your video storage capacity, as I did!
    3 people found this helpful
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    Top reviews from other countries

    Translate all reviews to English
    ANIBAL SANTOS HERNANDEZ
    5.0 out of 5 stars Buen producto
    Reviewed in Mexico on May 1, 2024
    Capacity: 4TBStyle: RedPattern: Hard DriveVerified Purchase
    Para ser mecanico, tiene una buena calidad y velocidad de transferencia, lo recomiendo totalmente
    Report
    Eduardo Tomazini
    5.0 out of 5 stars Excelente produto
    Reviewed in Brazil on January 12, 2024
    Capacity: 6TBStyle: RedPattern: Hard DriveVerified Purchase
    O que nao gostei foi que é o segundo HD que compro e a Amazon entrega ele em um envelope e deveria ser em caixa pois é um HD mecanico
    Report
    saul maldonado
    5.0 out of 5 stars llego sin problemas
    Reviewed in Mexico on December 8, 2023
    Capacity: 6TBStyle: RedPattern: Hard DriveVerified Purchase
    lo tuve que regresar por temas de compatibilidad pero a pesar de que cometí un error al verificar la compatibilidad del modelo no tuve ningún problema con el envío, producto, regreso.
    Report
    TELMO HANASHIRO
    5.0 out of 5 stars Muito bom, fiel ao anunciado
    Reviewed in Brazil on April 21, 2023
    Capacity: 4TBStyle: RedPattern: Hard DriveVerified Purchase
    Muito bom, O produto está funcionando e fico feliz em trabalha com empresas confiáveis.
    Report
    Trevor K.
    5.0 out of 5 stars Works great. Functions no differently than any other hard drive. Certainly not limited to "NAS" only
    Reviewed in Canada on July 25, 2022
    Capacity: 4TBStyle: RedPattern: Hard DriveVerified Purchase
    I managed to snag this drive for $66 on Amazon Warehouse Deals, and the drive was still fully sealed in the original anti-static bag. I used the drive for a second copy of my old backups and archived files. This red label NAS drive functions no differently than a WD Blue drive or any other hard drive for that matter. I'm not sure but NAS and surveillance drives *might* be built to slightly higher standards. I'm not sure. Maybe it will last longer. It connects just fine with a USB 3.0 dock and has a speed of 180MB/s or so. NVMe and SSD are better for desktop use, but hard drives remain cheap and reliable for backups and archives. I can't quite figure out what people are going to actually put on some of these 18TB or more sized drives. 4TB is still quite a lot. My only guess might be the large file size of 4K and 8K video. Personally I still think 1080p remains perfectly adequate with a quarter of the time needed to make copies. The eye can only see so much.
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