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  • WD Red 4TB 24x7
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WD Red 4TB 24x7

1 customer review

Price: $181.73 & FREE Shipping
In Stock.
Ships from and sold by Galactics.
  • New - Bare Drive
  • 3-Year Mfg Warranty
  • Western Digital WD40EFRX
  • WESTERN DIGITAL WD40EFRX RED 4TB NAS 64MB cache SATA 6.0Gb/s 3.5 internal hard drive
13 new from $175.99
$181.73 & FREE Shipping In Stock. Ships from and sold by Galactics.

Frequently Bought Together

WD Red 4TB 24x7 + WD Red 4TB NAS Hard Drive: 1 to 8-bay RAID Hard Drive: 3.5-inch SATA 6 Gb/s, IntelliPower, 64MB Cache WD40EFRX
Price for both: $335.73

These items are shipped from and sold by different sellers.

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Compare to Similar Items


This item: WD Red 4TB 24x7
Customer Rating (1) (308) (2470) (38)
Price $ 181.73 $ 181.49 $ 154.00 $ 218.99
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Galactics TheTechGroup Amazon.com Amazon.com
Hard Disk Size 4 TB 4 TB 4 TB 4 TB
Speed 5400 RPM 7200 RPM 5400 RPM 7200 RPM
Form Factor 3.5 inch 3.5 inch 3.5 inch 3.5 inch
Hardware Interface Information not Provided sata 6 0 gb sata 6 0 gb sata 6 0 gb
Cache Memory Installed 64 64 64 64
Add to Cart Add to Cart Add to Cart Add to Cart

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Product Description

Specifications Mfr Part Number: WD40EFRX Capacity: 4 TB Rotational Speed: IntelliPower Cache: 64 MB Interface: SATA 6Gb/s Max Data Transfer Rate: Buffer to Host: 6 Gb/s Host to/from Drive (Sustained): 150 MB/s Shock: Operating: 30Gs @ 2ms (read/write); 65Gs @ 2ms (read) Non-operating: 250Gs @ 2ms Acoustics: Idle Mode:  25 dBA Seek Mode:  28 dBA (average) Power Management: 12VDC ±10% (Peak): 1.75 A Read/Write: 4.5 Watts Idle: 3.3 Watts Standby: 0.4 Watts Sleep: 0.4 Watts Form Factor: 3.5 inch MTBF: 1,000,000 hours Dimensions (WxLxH): 4.000 x 5.787 x 1.028 inch / 101.6 x 147.0 x 26.1 mm Weight: 1.5 lbs / 0.68 kg RoHS Compliant

Product Details

  • Product Dimensions: 5.8 x 4 x 1 inches ; 1.5 pounds
  • Shipping Weight: 2 pounds (View shipping rates and policies)
  • ASIN: B00FB7VJB6
  • Item model number: WD40EFRX
  • Average Customer Review: 2.0 out of 5 stars  See all reviews (1 customer review)
  • Amazon Best Sellers Rank:
  • Product Warranty: For warranty information about this product, please click here
  • Date first available at Amazon.com: September 18, 2013

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Verified Purchase
I purchased this hard drive for use in a NETGEAR WNDR 4700 router which can hold an internal hard drive. The hard drive seems to have two different operating speeds. When the drive is working at it's fastest I can write to it at 15 to 20 MB/s; however when it is working at it's slow speed I only see 0.5 to 1.5 MB/s. Note that this is over a 450 MB/s wifi connection. I tried the drive in a USB 3.0 external enclosure, also connected to the router to determine if the router was slowing down the hard drive or if it was the hard drive itself. I received the same results in the enclosure. The majority of the time it operates at the slower speed if the hard drive is left on continuously.

The speed is important to me because I am utilizing the hard drive to store large video files and stream them over my network using Plex.

I'm sure the drive operates fine in other applications, but I would not recommend it for use a NETGEAR product.
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