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WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

  • Built for 24/7 surveillance
  • AllFrame technology for better performance
  • Designed to support up to 32 HD cameras
This product qualifies for the Iron Egg guarantee. We'll match any qualifying competitor's price.
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Learn more about the Western Digital WD40PURX

Quick Info


  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years

Customer Reviews of the Western Digital WD40PURX

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  • David G.
  • 12/15/2014 1:05:13 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggsHigh failure rate

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: Cheap bulk storage for a video recording server

Cons: Purchased six of these drives and two have failed within two weeks. Really not impressed.

Drives say 24 x 7 Reliability. Some kind of sick joke.

Other Thoughts: Should've went with Constellations or RE drives.

Did you find this review helpful? Yes No

4 out of 5 eggsNo issues yet.

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: -specifically made for 24/7/365 video surveillance data recording
-low noise/temp and power consumption
-sequential read write ~160MB/s is pretty fast for anlow power consumption HD
-32 Camera Compatibility
-no video lag or issues with archived video data
-price is great for a 4TB HD tuned specifically for video surveillance recording

Cons: -3 yr warranty is decent but not as good as the black series (5yr)
-GPT format for windows is necessary
-compatible issues with some DVRs due HD size

Other Thoughts: This is a great HD for a consumer/entry level surveillance system.The only concern I have is reliability issues once the hard drive ages and is constantly being used 24hrs a day.

Did you find this review helpful? Yes No

5 out of 5 eggsReliable HdD

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: Reliable hard disk drive, specifically designed for DVR purpose.
Runs fairly cool.

Cons: Price is pretty high. But since this hard disk drive is designed for a special purpose, that is understandable.
Sequential read : 146.2 MB/s and Sequential write: 143.2 MB/s.
Slow speed compared with other desktop HDD. But more than adequate for DVR uses.

Other Thoughts: Not all DVR will support 4TB HDD and if using PC based DVR, have to format as GPT partitions in order to use full 4TB in 1 partition.

Did you find this review helpful? Yes No

  • Eric J.
  • 10/22/2014 11:46:33 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsWD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: -Quiet
-Runs Cool
-Large Capacity

Cons: I have purchased 3 of these now. The first seems to be holding up but the second 2 have both had problems now. The first of the second 2 died after initializing it and would never format to gpt. The second is now unmounting itself during writes to the drive.

Other Thoughts: I will not invest any more money into these drives. HGST seem to have better reviews. I don't mind DOA but failing shortly after a month is just ridiculous.

3 out of 3 people found this review helpful. Did you? Yes No

  • Wendy P.
  • 10/21/2014 8:57:54 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year

1 out of 5 eggs2 DOA Drives in a Row

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: Very quiet and capable when you get a good one and the others we have used are working 24 x 7 for 4 straight months now

Cons: Just received a new drive from NEB. Before we install any drive, we connect it and run full WD diagnostics to and conclude by writing zeros to the full drive. Then we know it works properly. Two drives, the initial one shipped and the replacement each passed short diagnostics, but failed with over 50 sectors bad to write zeros to the drive. At 50, we stopped the tests. At build time, any platter imperfections are locked out by the firmware and then you receive a drive with no "bad sectors" and all can be written to and erased. Both drives were defective and in some way left the factory bad or damaged in handling even though in bubble plastic cases. Newegg has somehow gotten a bad batch of drives.

Other Thoughts: If you install a drive without thorough testing then don't be surprised later on down the road when you have problems. It is better to catch the problem before install than lose data and have corruptions and machine slow down due to drive problems that you cannot hear with the "old click to the ear" technique.

4 out of 4 people found this review helpful. Did you? Yes No

4 out of 5 eggsEnsure your surv. system is on WD list

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Trusted brand name, by me
Up to 32 input devices..that's a lot
Good Performance drive as well

Sequential Read : 171.609 MB/s
Sequential Write : 169.872 MB/s
Random Read 512KB : 47.021 MB/s
Random Write 512KB : 81.440 MB/s

Those are good numbers

Runs cool. 5 degrees less than my 2 TB WD Black

3 year Warranty

Cons: Not easy to find the info that indicates which security systems
are designed to take full advantage of the Purple lines features. The average Joe might not even think to look.

Fully compatible with only very expensive pro or rich guy surveillance systems

3 year warranty. I know I have it in Pros too.

Other Thoughts: Everywhere I go there are cameras recording data which means big sales for the camera makers and thus the storage industry. WD is attempting to get their share of this market with their Purple line of drives. The "tag" WD uses that makes these drives surveillance specific is termed "Allframe". The advantage of the AllFrame technology is possible only with host controller support. The vendor must be on the WD compatibility list to take advantage of the surveillance-specific features in the Purple drives.

On WD's compatibility page is a list of 27 vendors and the models that support Purple. Most of the names on the list
are not familiar to me. I started searching Newegg. Newegg has ~130 vendors listed under the heading:
Security & Surveillance > Video Monitoring Kits / All in One Systems. I selected at random just a couple; Geovision and QNAP, to see if what I was thinking was correct. I was thinking that the qualified vendors are more then likely "professional"
vendors. By professional I mean anything that doesn't have to do with home or very small business security. If price tag
has anything to do with my theory then I am born out. The QNAP offerings range in price from $982 to $4,902. I am not spending that to protect my home or very small business. If I am a large, well heeled company then my budget may allow for that but for my home, not happening.
What the people that do the reviews on Newegg ARE buying range in the $200 to $300 area. LaView, a popular well reviewed vendor is not on the WD compatibility list. Neither is 7modo, Night Owl and many more. This means that the Purple may not be money well spent for home surveillance.
Is it money well spent for essential video security recording for large business? Maybe if reduction of frame loss,
improved playback and an increased number of drive bays supported is important.

The first data I concern myself with when shopping hard drives is rotational speed. 7200 or 5400? WD has obfuscated,
for reasons I can only speculate on but won't, rotational speed with the "Intellipower" designation for the Purple drives RPM. HWInfo 64 reports the RPM's as 5400 which is plenty fast enough for the purpose of this drive, namely video surveillance.

I am using this drive to store all my video: Home movies, DVD's, Blu-Ray's, etc., etc. In almost of month of use it has been flawless for local and wireless networked viewing.

This is a very good drive. If you are a large company interested in quality surveillance then there is no better choice according to the data sheets. If you're a small company or homeowner on a $300 budget you will probably not be able to take advantage of the primary selling feature
of this drive. BUT that does NOT mean you are making an incorrect choice as I wrote this is a solid HD.

If you just want a large fast drive to store and access video this is a very good choice.

5 out of 5 people found this review helpful. Did you? Yes No

5 out of 5 eggsGreat hard drive from Western Digital

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: 4TB of hard drive space, awesome!
Built for surveillance systems
Rugged and solid design
Rock solid feel and very heavy (quality parts)
(in my testing) supported 8 cameras with no problems
It was able to handle h264 compression on all 8 cameras
I like that it states "surveillance" right on the hard drive
low noise and runs cool too
HDD is tuned for reliability running at low RPM, which is great for surveillance
3 years of warranty

Cons: price is just a little big higher than a 7800rpm 4TB hard drive
although it's heavy with quality parts, it's quite heavier than the 1TB that it replaced
I accidentally formatted in Windows 7 to NTSF and that took forever. Should keep it to GPT for surveillance.
Older DVR's only see 2TB on it even though it's a 4TB..not really the hard drive's fault at all though but I wanted to mention it.

Other Thoughts: I replaced the 2TB HDD for this WD 4TB HDD into a SWANN surveillance DVR with 8 cameras and I think it was the greatest upgrade I could do for the DVR.

Although the DVR does have fans, the unit was constantly hot to the touch because the HDD continually ran when recording or not. I noticed that the DVR unit was not so hot after installing the WD 4TB.

I tested for 1 full week, recording 24/7 and it's not even half full! Playback was flawless and usually there would be a little delay when I hit the record button (from standby), with the new WD 4TB HDD, I did not notice that lag.

Overall, this WD 4TB has great features built in specifically built for surveillance DVR's. I'm sure it would run in a NAS, but since it's built for low-continuous speed writing and reading, I wouldn't recommend it for any application other than surveillance DVR's.

I rate it 5 stars for quality, endurance, long 3 year warranty and it just plain out works out of the box. I would HIGHLY recommend it if you need to replace your HDD on your surveillance DVR, just make sure that the DVR supports 4TB HDD drives.

3 out of 4 people found this review helpful. Did you? Yes No

5 out of 5 eggsCool Drive Scores me Brownie points

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: Easy to upgrade the clubs Samsung sds p5 8 camera system for endless high quality surveillance

Hd Video is smooth (not jumpy) even night video is improved h264 compression

all 8 cameras running 24/7 for 3 months should not fill up this drive.

Cons: It is a heavy brick lol Can be a hassle to format gpt if you are using a windows os
Also extra steps were going gpt to ntfs

Other Thoughts: The speed of this drive is equal to a wd black and the quietness is a quiet as a wd green. Excellent security hard drive and this will get a lot of use.A very good 3 year warranty so I will check back with you in a year of 24/7/365

Did you find this review helpful? Yes No

5 out of 5 eggsgreat fit

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: fast / quiet / vibration free and cool running make this drive a bargain for the capacity.
with sequential reads and writes of approx. 135 MB/s this drive has no issues keeping up to my 8 camera surveillance setup.

Cons: none that i could find.

Other Thoughts: use the GPT partitioning scheme if running windows to get the full capacity.

1 out of 2 people found this review helpful. Did you? Yes No

4 out of 5 eggscool operator

This review is from: WD WD Purple WD40PURX 4TB SATA 6.0Gb/s 3.5" Hard Drive

Pros: Plugged this into a LaView system. Can retain about 3 months of footage from 4 cameras at high quality settings. Probably about 1 month with 8 cams. Video playback is error and glitch free. No jumpiness.

Runs quiet and cool. Pulls up video smoothly. No hard drive chugging.

This drive is tuned for reliable performance in systems that must stay on and continuously record 24/7. A lot of space, so you have breathing room and margin, in case you have an incident you have to retrieve and review from your shop or in your home.

Built to last even in hotter environments like server rooms or back closets.

Cons: Incompatible with older DVR systems. Check the requirements before you install in a Zmodo or other low end cam systems.

Other Thoughts: Looking forward to the day drives with this capacity come in the smaller laptop format, but that is probably not yet possible.

2 out of 2 people found this review helpful. Did you? Yes No

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