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WD Red 4TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch - WD40EFRX

Ships from United States.

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  • Specifically designed for use in NAS systems with up to 8 bays
  • Supports up to 180TB/yr workload rate
  • NASware firmware for compatibility
  • 3-year limited warranty
  • Small and home office NAS systems in a 24x7 environment

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Western Digital WD40EFRX

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy.
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Great NAS Drive

Overall Review: The drives arrived on time with no package damage. I installed them in my Synology DS918+, and there have been no problems. All bays in the Synology are filled, but if I ever need another NAS hard drive, I would buy these again.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Works so far

Pros: I bought 4 of these to use in a Synology NAS (btrfs). All 4 drives worked. I'm able to max out a 1 Gbps link with them. Unless they fail in the first 3 months, I hope they last 5+ years.

Cons: Too early to tell. We'll see what the failure rate is.

Overall Review: I'd have preferred a slightly larger drive at 7,200 RPM, but that's hard to find at this price. This drive is very good value for the money. Keep in mind, if buying for NAS, you'll probably want multiple drives (at least 3 and ideally more, depending on your budget).

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Used to Upgrade Tivo Roamio

Pros: Uses PMR and not the newer SMR technique which can cause problems when used in a Tivo.

Cons: None

Overall Review: This is one of the recommended drives for upgrading the storage capacity of a Tivo Roamio. Very quiet and no issues after 10 days.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
used in a Qnap for home Backup

Pros: Installed and worked without any problems

Cons: none so far

Overall Review: good form fit and function
no problems so far

1 out of 1 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
5/ 5
Surprisingly adept as IP camera drives

Pros: - Cheap cost per terabyte
- Doesn't skimp on error correction like official surveillance drives do for speed
- Seems fast enough despite having full error correction, in my setup I have two drives in RAID-0 configuration with 10 feeds being written to that RAID-0 volume, averaging 54 reads per second per drive, 28 writes per second per drive, 254KB/s reads per drive, 9800KB/s writes per drive, average wait time is 60ms and average utilization is 14%
- The drives differ in average utilization by only 0.5% so they're quite consistent in performance
- They run fairly cool so long as there's some air flow around them

Cons: - Occasional frame queue pile-ups (a frame gets dropped every 10 minutes or so) , recalibration or..? But a price I'm willing to pay for cheap HDD instead of SSD

Overall Review: - As far as I can tell one doesn't need to compromise on error correction by using surveillance drives for surveillance, these NAS drives work just as well, at least in small-to-mid-sized installations.

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Perfect package and perfect quality quality product

Pros: Thanks for perfect job

Cons: Thanks

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Ownership: 1 week to 1 month
Verified Owner
5/ 5
Good price for 4tb NAS drive

Pros: WD NAS drives rate higher than other NAS drives
Good price for 4tb

Overall Review: Would recommend this drive for price performance

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Ownership: more than 1 year
Verified Owner
4/ 5
The one to get for FreeNAS

Pros: When you have an HBA and need a bunch of discs to set up a storage pool, accept no substitute! The reliability of WD Reds is not anecdotal, go check out the quarterly Backblaze Storage Reports.

Cons: No 5 year warranty.

Overall Review: Good Drives. I wish they had the same 5 year warranty that WD's TLER enabled RE3 and RE4 drives used to have.

3 out of 3 people found this review helpful. Did you?
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