WD WD121PURP Purple Pro 3.5in 12TB 256MB
WD Purple Pro drives are designed for new generations of high-end AI-enabled recorders, video analytics appliances, deep-learning servers and cloud solutions that can benefit from high-capacity storage with high performance and additional workload capability. WD Purple Pro drives feature AllFrame AI technology, which helps reduce frame loss, improve overall video playback, and not only enables recording of multiple streams per camera but also supports up to 32 AI streams per drive for deep learning analytics within the system. WD Purple Pro drives also feature enterprise-class performance, data integrity and drive reliability, especially in larger-scale systems and enclosures where operational vibration is present.
WD Purple Pro drives are designed for new generations of high-end AI-enabled recorders, video analytics appliances, deep-learning servers and cloud solutions that can benefit from high-capacity storage with high performance and additional workload capability. WD Purple Pro drives feature AllFrame AI technology, which helps reduce frame loss, improve overall video playback, and not only enables recording of multiple streams per camera but also supports up to 32 AI streams per drive for deep learning analytics within the system. WD Purple Pro drives also feature enterprise-class performance, data integrity and drive reliability, especially in larger-scale systems and enclosures where operational vibration is present.
WD Purple Pro drives are designed for new generations of high-end AI-enabled recorders, video analytics appliances, deep-learning servers and cloud solutions that can benefit from high-capacity storage with high performance and additional workload capability. WD Purple Pro drives feature AllFrame AI technology, which helps reduce frame loss, improve overall video playback, and not only enables recording of multiple streams per camera but also supports up to 32 AI streams per drive for deep learning analytics within the system. WD Purple Pro drives also feature enterprise-class performance, data integrity and drive reliability, especially in larger-scale systems and enclosures where operational vibration is present.
WD Purple Pro drives are designed for new generations of high-end AI-enabled recorders, video analytics appliances, deep-learning servers and cloud solutions that can benefit from high-capacity storage with high performance and additional workload capability. WD Purple Pro drives feature AllFrame AI technology, which helps reduce frame loss, improve overall video playback, and not only enables recording of multiple streams per camera but also supports up to 32 AI streams per drive for deep learning analytics within the system. WD Purple Pro drives also feature enterprise-class performance, data integrity and drive reliability, especially in larger-scale systems and enclosures where operational vibration is present.
in 18 offers
The lowest price for WD WD121PURP Purple Pro 3.5in 12TB 256MB right now is $499.00 at PCByte AU, compared across 12 retailers.
The all-time low was $355.01 on 26 Feb 2026 — today's price is 41% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 10 June 2026.
Last updated at 10/06/2026 12:37:35
Western Digital 12TB Purple Pro 7200RPM 3.5in SATA Hard Drive (WD121PURP)
Western Digital 12TB Purple Pro 7200RPM 3.5in SATA Hard Drive (WD121PURP)
30-day returns
Western Digital 12TB Purple Pro 7200RPM 3.5in SATA Hard Drive (WD121PURP)
30-day returns
Western Digital 12TB Purple Pro 3.5in SATA 7200RPM Surveillance Hard Drive (WD122PURP)
30-day returns
WD Purple Pro Smart Video 12TB 7200 RPM 3.5" SATA Surveillance Hard Drive
7-day returns
WD Purple Pro 12TB WD122PURP 3.5" SATA HDD 7200RPM
WD WD121PURP 12TB Purple Pro 3.5" SATA3 Surveillance Hard Drive
WD WD122PURP 12TB Purple Pro 3.5" SATA3 Surveillance Hard Drive
WD Purple Pro 12TB 3.5" Surveillance Hard Drive WD122PURP
Free delivery
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Wd Purple Pro 12tb 3.5" Surveillance Hard Drive 256mb Cache Sata3
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
originally posted on westerndigital.com
I have a lottttt of data so I got this. I did not realize the transfer rates on 3.5inch spinning drives have gone up. With a USB 3 adapter/reader dock this was transferring over 100mbps. It makes the spinning drive sounds that these make, but it is actually quit quiet. I use it exposed versus enclosed so it is a little more clicky sounding, but sound wise, if it were enclosed, it would probably be unnoticeable. Plus, it doesn't sound that bad - I actually miss the sound of data moving around haha. I would need it to be used for years to really write on reliability as I have neevr owned these, but looking at the specs, this appears to be a similar design, if not the same drive as their commercial grade drives for business. I always try to go for the best and I take ... MoreI have a lottttt of data so I got this. I did not realize the transfer rates on 3.5inch spinning drives have gone up. With a USB 3 adapter/reader dock this was transferring over 100mbps. It makes the spinning drive sounds that these make, but it is actually quit quiet. I use it exposed versus enclosed so it is a little more clicky sounding, but sound wise, if it were enclosed, it would probably be unnoticeable. Plus, it doesn't sound that bad - I actually miss the sound of data moving around haha. I would need it to be used for years to really write on reliability as I have neevr owned these, but looking at the specs, this appears to be a similar design, if not the same drive as their commercial grade drives for business. I always try to go for the best and I take my data integrity very seriously which si why I chose this specific model. The specs that relate to reliability were the highest I could find at a reasonable price point so I am not disappointed. It actually stays quite cool as I transferred multiple terabytes worth of data at a time and it never really got hot, just warm - and this was in an open dock without a fan or active cooling. When I need to access data or write, it is very quick and never gives me trouble. I am pretty sure I will have this for years - especailly as I always get an overkill for my needs to ensure reliability and longevity.
originally posted on homeessentialsdirect.com
Got it for my Ubiquiti dream machine SE ,18 TB ,it is little noise compared to other drives I’ve owned but works flawless ,would definitely buy again.
originally posted on westerndigital.com
Great product works as expected would definitly buy again
| General | |
| Device Type | Hard drive - internal |
| Capacity | 12 TB |
| Form Factor | 3.5" |
| Interface | SATA 6Gb/s |
Western Digital 12TB Purple Pro 7200RPM 3.5in SATA Hard Drive (WD121PURP)
Western Digital 12TB Purple Pro 7200RPM 3.5in SATA Hard Drive (WD121PURP)
30-day returns
Western Digital 12TB Purple Pro 7200RPM 3.5in SATA Hard Drive (WD121PURP)
30-day returns
Western Digital 12TB Purple Pro 3.5in SATA 7200RPM Surveillance Hard Drive (WD122PURP)
30-day returns
WD Purple Pro Smart Video 12TB 7200 RPM 3.5" SATA Surveillance Hard Drive
7-day returns
I have a lottttt of data so I got this. I did not realize the transfer rates on 3.5inch spinning drives have gone up. With a USB 3 adapter/reader dock this was transferring over 100mbps. It makes the spinning drive sounds that these make, but it is actually quit quiet. I use it exposed versus enclosed so it is a little more clicky sounding, but sound wise, if it were enclosed, it would probably be unnoticeable. Plus, it doesn't sound that bad - I actually miss the sound of data moving around haha. I would need it to be used for years to really write on reliability as I have neevr owned these, but looking at the specs, this appears to be a similar design, if not the same drive as their commercial grade drives for business. I always try to go for the best and I take ... MoreI have a lottttt of data so I got this. I did not realize the transfer rates on 3.5inch spinning drives have gone up. With a USB 3 adapter/reader dock this was transferring over 100mbps. It makes the spinning drive sounds that these make, but it is actually quit quiet. I use it exposed versus enclosed so it is a little more clicky sounding, but sound wise, if it were enclosed, it would probably be unnoticeable. Plus, it doesn't sound that bad - I actually miss the sound of data moving around haha. I would need it to be used for years to really write on reliability as I have neevr owned these, but looking at the specs, this appears to be a similar design, if not the same drive as their commercial grade drives for business. I always try to go for the best and I take my data integrity very seriously which si why I chose this specific model. The specs that relate to reliability were the highest I could find at a reasonable price point so I am not disappointed. It actually stays quite cool as I transferred multiple terabytes worth of data at a time and it never really got hot, just warm - and this was in an open dock without a fan or active cooling. When I need to access data or write, it is very quick and never gives me trouble. I am pretty sure I will have this for years - especailly as I always get an overkill for my needs to ensure reliability and longevity.
Got it for my Ubiquiti dream machine SE ,18 TB ,it is little noise compared to other drives I’ve owned but works flawless ,would definitely buy again.
Great product works as expected would definitly buy again
I bought this drive to increase the capacity of my security DVR from 2TB to 12TB. I have had good experience in the past with various types of Western Digital drives -- no failures at all on drives I purchased new -- and the specifications are good. I was particularly attracted by the five-year warranty. It installs like any other drive, and I don't notice any excessive noise, though there are other noisemakers in the room so I don't have a very good read on this. I did a full surface scan, run by the DVR, which showed no bad sectors. It's a big drive, so it took 36 hours! Overall I am pleased with the drive.
The drives are great and quck shipping. I have about 10 dives of this type I use for cameras and backup system.
I purchased two 18Tb WD Purple Pro drives for a Ubiquiti NVR that I set up at a construction site. I have used these drives before with other UniFi NVRs and they work very well. I just added several additional 4K cameras so I am also adding two more drives to the system. We are using the drives for security and to document the build. I have had other WD Purple Pro drives in use for over a year on similar projects and they have been working well.
These drives are pretty good, no problems almost a year old now. Would purchase again.
WD 10Tb HDD is a good economical solution for a recorder in a residential surveillance system.
Great HDD compatibility with Unifi UNVR. It is a go
We have always relied on Western Digital drives and these purpose surveillance grade are the best.
| General | |
| Device Type | Hard drive - internal |
| Capacity | 12 TB |
| Form Factor | 3.5" |
| Interface | SATA 6Gb/s |
