Western Digital Red 4 TB Internal HDD

Mfg.Part: WD40EFRX | CDW Part: 3123305 | UNSPSC: 43201803
Availability: In Stock
Was $179.99
$116.99 Advertised Price
Advertised Price
Product Details
  • Hard drive
  • 4 TB
  • internal
  • 3.5"
  • SATA 6Gb/s
  • buffer: 64 MB
  • for My Cloud EX2; EX4
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Western Digital Red 4 TB Internal HDD
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Product Overview

Main Features
  • Hard drive
  • 4 TB
  • internal
  • 3.5"
  • SATA 6Gb/s
  • buffer: 64 MB
  • for My Cloud EX2; EX4

There's a WD Red drive for every compatible NAS system to help fulfill your data storage needs. With drives up to

12TB, WD Red offers a wide array of solutions for customers looking to build a high performing NAS storage solution.

Built for single-bay to 8-bay NAS systems, WD Red packs the power to store your precious data in one powerhouse unit.

With WD Red, you're ready for what's next.

The drive for NAS

Desktop drives aren't typically tested or designed for the rigors of a NAS system. Do right by your NAS and choose the

drive with an array of features to help preserve your data and maintain optimum performance.

Built for NAS Compatibility

WD Red drives with NASware 3.0 technology are purpose-built to balance performance and reliability in NAS and RAID


Keep it Cool

The always-on environment of a NAS or RAID is a hot one. WD Red drives are engineered to run cool and quiet while

offering optimum compatibility for demanding 24x7 environments.

Western Digital Red 4 TB Internal HDD is rated4.81 out of5 by16.
Rated 5 out of 5 by from another great WD productWestern Digital drives continue to be very good products.
Date published: 2019-02-21T00:00:00-05:00
Rated 5 out of 5 by from Great Drive for NASWe use the WD Red drives in all of our NAS deployments. Drives have been extremely reliable.
Date published: 2016-01-27T00:00:00-05:00
Rated 5 out of 5 by from Excellent External DriveUse: Synology RackStations NASExcellent DrivesHave been using these drives for awhile now(few years)with no failures to date.I would definitely recommend these for a NAS. Thank YouRick
Date published: 2016-11-17T00:00:00-05:00
Rated 5 out of 5 by from Good product.The hard drive seems to be in good working order and the product in general seems to have a good shelf life.
Date published: 2017-08-10T00:00:00-04:00
Rated 5 out of 5 by from Good driveExpansive drive, but it worth it.Great drive. I would recommended.
Date published: 2016-01-13T00:00:00-05:00
Rated 5 out of 5 by from Great valueWe replaced some WD Black 2TB drives with these 4TB Red models in our NAS. No performance degradation has been seen.
Date published: 2013-12-04T00:00:00-05:00
Rated 5 out of 5 by from Used with Synology DS1817+I purchased WD Reds for my DS1817+ due to the price and reliability of these drives. No issues so far!
Date published: 2017-06-01T00:00:00-04:00
Rated 5 out of 5 by from Best bang for the backWe use these drives to populate our iSCSI servers in a RAID 6 configuration. Quality is consistent and failure rate confirms to posted MTBF. Purchased eight of them recently and no issues.
Date published: 2014-11-12T00:00:00-05:00
Rated 5 out of 5 by from Very reliable driveAfter burning through several different makes and models of drives for our NAS systems, we finally settled on these Red drives, and thus far I have had a zero failure rate.
Date published: 2015-02-11T00:00:00-05:00
Rated 5 out of 5 by from Good Drives. Time will tell about reliability!I used 4 of these in a Netgear NAS box for backup purposes, so no live critical data. So far they have been humming along fine with no failures. They seem to be quiet, cool and so far a very reasonable investment.I prefer to buy drives at CDW vs. the other places due to packaging alone. I have not had a DOA from them yet.
Date published: 2013-11-13T00:00:00-05:00
Rated 5 out of 5 by from Solid drive for NAS storageThis drive replaced a 1-year-old drive in a RAID NAS box. I hope this one lasts longer than the original. Seems good so far.
Date published: 2017-05-17T00:00:00-04:00
Rated 5 out of 5 by from They work like they shouldThese plug in and worked just fine, no failed drive and no DOA, of course a drive can always fail but these are good
Date published: 2016-02-10T00:00:00-05:00
Rated 5 out of 5 by from Great drivesNice and not too expensive 4TB drive. Used for QNAP
Date published: 2015-06-03T00:00:00-04:00
Rated 5 out of 5 by from AWESOME PRODUCTWe have been updating our back up systems and are using these drives in our NAZ Box! Great choice!
Date published: 2015-12-16T00:00:00-05:00
Rated 5 out of 5 by from Good reliable drivesI've never had one of these drives fail on me. I most often use them in large RAID configs in our NAS hardware.
Date published: 2016-08-25T00:00:00-04:00
Rated 5 out of 5 by from This product is a great valueI bought 4 of these to put into a NAS for backup. Installation was a breeze. All 4 worked perfectly and have been reliable. The price is great for 4TB of storage space.
Date published: 2015-01-28T00:00:00-05:00