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The Western Digital 22TB WD Purple Pro is a surveillance-optimized internal hard drive featuring OptiNAND technology, a 512MB cache, and SATA 6 Gb/s interface. Designed for AI-enabled, always-on video recorders and servers, it supports up to 64 HD camera streams with a workload rating of 550TB/year and an MTBF of 2.5 million hours. Dust resistant and built for continuous 24/7 operation, this 3.5-inch drive delivers enterprise-class performance and reliability for advanced video surveillance systems.







| ASIN | B0B5VYRJ6Q |
| Additional Features | Dust Resistant |
| Best Sellers Rank | #5 in Internal Hard Drives |
| Brand | WD |
| Built-In Media | Internal Hard Drive |
| Cache Memory Installed Size | 22 |
| Color | Purple |
| Compatible Devices | Server, Storage System, Video Surveillance System |
| Connectivity Technology | SATA |
| Customer Reviews | 4.1 out of 5 stars 408 Reviews |
| Digital Storage Capacity | 22000 GB |
| Enclosure Material | Information Not Available |
| Form Factor | 3.5-inch |
| Global Trade Identification Number | 00718037893532 |
| Hard Disk Average Latency | 4.17 Milliseconds |
| Hard Disk Description | Mechanical Hard Disk |
| Hard Disk Form Factor | 3.5 Inches |
| Hard Disk Interface | Serial ATA-600 |
| Hard Disk Rotational Speed | 7200 RPM |
| Hard-Drive Size | 22 TB |
| Hardware Connectivity | ATA |
| Installation Type | Internal Hard Drive |
| Item Dimensions L x W x Thickness | 5.79"L x 3.5"W x 1.05"Th |
| Item Type Name | Hard Drive |
| Item Weight | 1.5 Pounds |
| Manufacturer | Western Digital Technologies, Inc. |
| Mfr Part Number | WD221PURP |
| Model Name | WD Purple Pro |
| Model Number | WD221PURP-SPB9SY0 |
| Number of Items | 1 |
| Read Speed | 445 Bytes Per Second |
| Special Feature | Dust Resistant |
| Specific Uses For Product | Surveillance |
| UPC | 718037893532 |
| Unit Count | 1.0 Count |
| Warranty Description | 5 year limited warranty |
B**L
Cool, quiet and reliable drive
Installed the 10TB drive in a Ubiquiti Dream Machine Pro without any issues. I only have two doorbells and 2 cameras at this point, so obviously it handles that without a problem. Drive makes no audible noise a foot away from the router. These 10TB models seem to be the best bang for your buck. Obviously hard to comment on reliability other than to say WD hasn’t failed me yet.
N**L
WD Purple Pro 12TB – The Hard Drive That Never Sleeps (Because It’s Watching You Sleep)
I bought this beast to drop into my Amcrest NVR system because apparently, my house needed the same level of surveillance as Fort Knox. Spoiler alert: it works perfectly — and now my house is basically the Truman Show, but with better resolution. 🎥 Why I Love This Drive: 12 Terabytes of "You Saw Nothing, Officer" Seriously, it holds weeks of 4K footage from multiple cameras, including the one pointed at my driveway that’s mostly squirrels doing parkour. Purpose-Built for Paranoia Designed for 24/7/365 surveillance workloads. No naps. No coffee breaks. Just pure, tireless storage of every Amazon delivery and mysterious leaf blower incident. Plug-and-Paranoia Installation Installed in my Amcrest NVR like it was born there. No firmware drama, no compatibility tantrums. Just silence... and a blinking light of judgment. Cooler Than Your Ex Runs quiet, stays cool, and doesn’t randomly ghost you like a desktop hard drive shoved into a job it wasn’t hired for. 512MB Cache = Smooth Playback Rewinding suspicious backyard activity in crisp HD has never been this satisfying. Even if it was just a raccoon again. 🧠 Final Thoughts: If you're serious about home security (or just want to capture footage of your neighbor stealing your trash cans), this is the drive. It’s like a security guard that never blinks and never asks for a raise. Buy it. Install it. Sleep easy — unless you're worried what it might've caught you doing
M**K
High failure rate - check your drives right away!
I bought two of these for my NVR. One plugged in and worked just fine. The other was DOA - NVR reported an error and it wouldn't spin up. Eh, no big deal, it happens, I returned it to Amazon and they sent me replacement. This one was ALSO DOA. At this point I wondered if maybe my NVR backplane had an issue, so I tested the drive in other computers; nope, still dead. I switched around my existing NVR drives, and that slot works fine. So, two dead drives out of three. I then came here to check reviews, and I see many 1-star Dead-on-Arrival reviews, with many people apparently not checking until after return period (that sucks!). If you want to take the gamble, just be sure you check your drives right away when they show up!
B**N
Works!
Easy to connect to my camera system, works as indicated
O**E
Upgraded Video Storage in my security system
The biggest issue I faced was the inability to order 4 drives as Amazon limited the number of drives to 3 With the limited stock I almost did not buy them, but was able to get my wife to order the 4th drive Sadly the drives 24hrs latter had dropped in price, a little frustrating but a fact of life in todays market The drives turned up in a paper bag that was split, the box’s were a little banged up, but the internal packaging probably prevented any serious damage. I hot swapped the 4 drives & the array built itself, taking about 2 days The performance of the system when loading detections has been improved but at a cost of more noise The 7200rpm drives are significantly noisier than the 5400 rpm which may result in the system being moved to place where the noise is not a problem So all told happy with the choice at the moment, but will come back to update this review if anything happens that prospective buyers would be interested in
R**L
Reliable high-capacity drive built for continuous surveillance recording
I purchased the Western Digital 8TB WD Purple Pro surveillance hard drive for a security camera recording system, and it has been performing exactly as expected. WD Purple Pro drives are specifically designed for surveillance environments that run 24/7, which makes them a great choice for NVR or DVR setups that constantly record video. Installation was simple and the drive was recognized immediately by the system. The 8TB capacity provides plenty of storage for continuous recording and longer video retention, which is especially useful when running multiple cameras. The drive runs smoothly and quietly while handling constant write activity from several camera feeds. The 256 MB cache also helps keep performance consistent when multiple streams are being recorded at the same time. The overall build quality feels solid and dependable, which is important for systems that need to run continuously without interruption. Western Digital has a strong reputation for storage products, and this drive fits right in with that level of reliability. Pros - Designed specifically for 24/7 surveillance systems - Large 8TB capacity for extended video storage - Handles multiple camera streams smoothly - 256 MB cache helps maintain steady performance - Quiet operation - Good value for high-capacity surveillance storage - Mounts easily in standard 3.5 inch drive bays Cons - Not intended for typical desktop or gaming workloads Overall If you need dependable storage for an NVR or DVR surveillance system, the WD Purple Pro series is a great option. It’s built for continuous recording, provides plenty of storage space, and offers the reliability you want in a security camera setup.
J**R
Installed into Unifi Instant
I got this for the 7200 RPM spec recommended for the Unifi Instant. Runs hotter and louder than the 3TB 5400 RPM drive I was using of course but provides an additional 7TB of space. This provides an estimated 56 days of recording with Balanced setting. Protect response slightly quicker.
N**D
Genuine & Brand New
Brand new
E**E
Excelente
Buena marca para almacenar video vigilancia
L**O
facil instalação
boa capacidade e facil instalação
M**E
Always use WD
I always use Western Digital Drives. Always reliable.
P**L
Ok
Narazie działa
C**N
Disque dur vidéo
J'ai eu un souci avec le disque dur dès que je l'ai essayé aucun signal il ne répondait pas, j'ai appelé le SAV, il m'en on renvoyé un très rapidement.... Merci amazon 👍👍
Trustpilot
2 months ago
1 month ago