The Western Digital WD Purple 4TB Surveillance Hard Drive WD40PURX is a surveillance-class 3.5-inch SATA HDD engineered for continuous video recording in compatible DVR and NVR security systems. Featuring 4TB capacity, SATA 6Gb/s connectivity, 64MB cache and WD AllFrame technology, the WD40PURX is designed to help reduce frame loss and provide dependable recording and playback for always-on surveillance applications.
Unlike general-purpose desktop storage, WD Purple drives are designed around the write-intensive workloads common in video surveillance. AllFrame technology works with ATA streaming functionality to improve video capture and playback, making the drive suitable for home security, retail surveillance, commercial premises and other compatible CCTV recording applications.
The WD40PURX provides a 5400 RPM performance class, 64MB cache, and sustained transfer rates of up to 150MB/s. Its standard 3.5-inch format makes it suitable for compatible surveillance recorders and storage enclosures that support SATA hard drives.
What's Included in the Box
1 × Western Digital WD Purple WD40PURX 4TB 3.5-inch Surveillance HDD
Main Features
4TB surveillance storage capacity for recorded security footage
WD AllFrame technology designed to help reduce video frame loss
Engineered for 24/7 surveillance environments
SATA 6Gb/s interface
Standard 3.5-inch form factor
64MB cache
5400 RPM performance class
Up to 150MB/s sustained transfer rate
Advanced Format architecture
Up to 180TB/year workload rating
Tarnish-resistant components for increased durability
Low-power design for cooler, efficient operation
Designed specifically for compatible DVR and NVR surveillance applications
Detailed Specifications
Specification
Details
Brand
Western Digital / WD
Product Family
WD Purple
Product Code / Model
WD40PURX
Drive Type
Surveillance Hard Disk Drive
Capacity
4TB
Form Factor
3.5-inch
Interface
SATA 6Gb/s
Cache
64MB
Performance Class
5400 RPM Class
Maximum Sustained Transfer Rate
Up to 150MB/s
Advanced Format
Yes
Workload Rating
Up to 180TB/year
Load/Unload Cycles
300,000
Non-Recoverable Read Error Rate
<1 in 10¹⁴ bits read
Operating Temperature
0°C to 65°C
Non-Operating Temperature
-40°C to 70°C
Read/Write Power
Approx. 5.1W
Idle Power
Approx. 4.5W
Standby/Sleep Power
Approx. 0.4W
Dimensions (H × L × W)
26.1 × 147 × 101.6mm
Weight
Approx. 0.68kg
Published Warranty
3-Year Limited Warranty
Practical Use Scenarios
The WD40PURX 4TB surveillance HDD is suitable for a variety of security recording applications, including:
Actual recording duration depends on camera resolution, bitrate, compression codec, frame rate, number of cameras and recording schedule.
Compatibility
The WD40PURX uses an industry-standard 3.5-inch SATA interface and is intended for compatible surveillance recording equipment.
Before purchasing, confirm that the intended DVR, NVR, server or enclosure supports:
3.5-inch SATA hard drives
SATA 6Gb/s or compatible SATA connectivity
4TB drive capacities
Surveillance-class hard drives
Compatibility with a specific recorder should always be confirmed against the equipment manufacturer's specifications.
Warranty Information
3-year limited warranty.
About Western Digital
Western Digital is a global data-storage technology brand producing hard disk drives, flash storage and other data-storage solutions. The WD Purple product family is specifically designed for surveillance applications, with technologies developed around continuous video recording and security-system workloads.
SKU
WD40PURX
Excellence for the Australian and New Zealand Market
The Western Digital WD40PURX uses standard 3.5-inch SATA connectivity, making it suitable for compatible surveillance equipment used throughout Australia and New Zealand.
As the WD40PURX is an older-generation product, customers should verify compatibility with their specific DVR or NVR and confirm warranty status for the individual drive before purchase.
Claims regarding Australian or New Zealand certification, authorised local distribution, or manufacturer-backed local warranty should only be made where these details can be confirmed for the specific stock being supplied.
No NDSS approval claim is made for the WD40PURX.
FAQs
What is the Western Digital WD40PURX designed for?
The WD40PURX is a 4TB WD Purple surveillance hard drive designed for continuous video storage in compatible DVR, NVR and CCTV security recording systems.
What storage capacity does the WD40PURX provide?
The WD40PURX provides 4TB of storage capacity, offering substantial space for recorded surveillance footage.
What interface does the WD40PURX use?
The WD40PURX uses a SATA 6Gb/s interface and features a standard 3.5-inch hard drive form factor.
How much cache does the WD40PURX have?
The WD40PURX is equipped with 64MB of cache.
What is the rotational performance class of the WD40PURX?
The WD40PURX is specified as a 5400 RPM performance-class surveillance hard drive.
Is the WD40PURX designed for 24/7 surveillance recording?
Yes. The WD40PURX belongs to the WD Purple surveillance storage family and is engineered for always-on video surveillance applications.
Does the WD40PURX feature WD AllFrame technology?
Yes. The WD40PURX features WD AllFrame technology, designed to improve surveillance video recording and help reduce video frame loss.
Can the WD40PURX be installed in any DVR or NVR?
The WD40PURX uses standard 3.5-inch SATA connectivity, but compatibility is not universal. Confirm that the specific DVR or NVR supports 4TB 3.5-inch SATA hard drives before installation.
What warranty was offered with the WD40PURX?
Published specifications for the WD40PURX list a 3-year limited warranty. Because WD40PURX is an older model, current warranty eligibility for an individual drive should be verified separately.
Is the WD40PURX suitable for CCTV security systems?
Yes. The WD40PURX is specifically designed as a surveillance hard drive and can be used with compatible CCTV DVR and NVR recording systems.
Is the WD40PURX the same as newer WD Purple 4TB hard drives?
No. The WD40PURX is an earlier-generation WD Purple 4TB surveillance drive. Newer WD Purple models can have different model numbers, cache sizes, performance characteristics and technical specifications.
Surveillance hard drives are not eligible for return due to change of mind. Please ensure the selected capacity and specifications are suitable for your system before purchasing.
The hard drive model and cache size supplied may vary depending on distributor availability. Although the product description may display the most commonly supplied model and specifications, an equivalent surveillance-grade hard drive may be provided.
The minimum cache size supplied is 64 MB. If you require a particular hard drive model or cache size, please contact CCTV Tradie before placing your order to confirm availability.
This does not affect your rights under the Australian Consumer Law in the event of a confirmed product fault or major defect.
Important Notice: Due to the ongoing global hard drive shortage, prices are changing rapidly, and stock levels are expected to sell out quickly. In the event that stock is exhausted before your order is processed, CCTV Tradie reserves the right to cancel your order and issue a full refund or contact you to discuss available alternatives.
FREE SHIPPING ON ORDERS OVER $500 AUSTRALIA WIDE, except for large and heavy items such as cabinets, racks, Cable reels, and bollards, etc.
All orders are delivered using the Australia Post shipping method and this is the most efficient method of delivery.
A flat rate of $12 applies to all orders under $500, excluding heavy and large items, which will incur a specific shipping cost displayed at checkout.
Delivery typically takes 3-5 business days all over Australia, including Tasmania.
New Zealand: 10-15 business days.
Processing Times
We process orders from Monday to Friday, ensuring they are shipped within 24 hours of placement, excluding weekends and public holidays.
Tracking Your Order
Once your order is packed and dispatched from our warehouse, you will receive an email with a tracking number. This tracking number can be used to monitor your parcel's progress.
For your convenience, if you are not home at the time of delivery, the delivery driver will leave your parcel in a secure place if deemed safe. If it is not safe to leave the parcel, or if the parcel is too large, a card will be left with instructions on how to retrieve your parcel from the local depot.
Warranty period is given in the product description.
CCTV Tradie’s Products come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure of the Product and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the Products repaired or replaced if the Products fail to be of acceptable quality and the failure does not amount to a major failure.
✅ Change of mind returns: Accepted within 7 days of receiving your order.
✅ Products must be unused, uninstalled, and returned in their original packaging with all accessories.
✅ A completed Return Form must be included with every return.
✅ 7–30 Days: Approved change-of-mind returns are eligible for store credit only. A $30 restocking fee applies, depending on the value of the returned item.
❌ Used, installed, or damaged products are not eligible for return unless covered under warranty or Australian Consumer Law.
❌ Hard drives can only be returned if they have a confirmed major defect or failure.
🚚 Customers are responsible for return shipping costs unless the item has a major fault covered by Australian Consumer Law.
🔍 All returned items are inspected before any refund, replacement, or store credit is approved.
Uncompromising Storage with a WD Purple Surveillance Hard Drive
WD Purple™ drives are engineered specifically for surveillance to help withstand the elevated heat fluctuations and equipment vibrations within NVR environments. An average desktop drive is built to run for only short intervals, not the harsh 24/7 always-on environment of a high-definition surveillance system. With WD Purple, you get reliable, surveillance-class storage that’s tested for compatibility in a wide range of security systems, and some of our latest models (WD22PURZ, WD42PURZ, and WD63PURZ) have improved power efficiency. Exclusive AllFrame™ technology helps reduce frame loss and improve overall video playback
Industry-Leading Storage. Surveillance You Can Trust.
Western Digital is a worldwide leader in the hard drive industry. With WD Purple™ surveillance storage, you have a drive engineered for high temperature, always-on surveillance systems so you can rely on quality video playback when you need it most. Whether you’re protecting loved ones or monitoring your business, WD Purple™ offers performance you can trust.
Western Digital's Exclusive AllFrame™ Technology
All WD Purple™ drives are equipped with AllFrame™ technology, which improves ATA streaming to help reduce frame loss and improve overall video playback, within a multitude of security video solutions.
Enhanced Workload Ratings
WD Purple™ drives feature a workload rating of up to 180TB/year2- up to three times that of desktop drives - to handle the unique demands of mainstream video surveillance DVR and NVR systems.
Multiple Cameras, Multiple Streams
Modern recorders now support multiple video streams per camera. WD Purple™ drives support up to 64 single-stream HD cameras (6TB1and above), and can also support many of the latest cameras that transmit multiple streams to enable basic AI functionality. With so many options, you have the flexibility to upgrade or expand your security applications in the future.
Designed for Today's and Tomorrow's Surveillance Solutions
With an MTBF of up to 1 million hours3, WD Purple™ drives are engineered for mainstream surveillance DVRs and NVRs that operate 24/7. With tarnish-resistant components3and support for more than eight bays4, WD Purple drives deliver reliable operation even in harsh environments.
Wide Compatibility. Seamless Integration.
WD Purple™ hard drives are built with compatibility in mind, so you can quickly and seamlessly add capacity to your surveillance system. With a wide range of industry-leading enclosures and chipsets supported, you’re sure to find the DVR or NVR configuration that’s right for you.
Proactive Storage Management with WDDA
Western Digital Device Analytics™ (WDDA) provides a wealth of storage device parametric operational and diagnostic data to the system; algorithms interpret the data and direct the system to alert system administrators of specific recommended actions to address potential issues. WDDA is intended to empower OEMs, system integrators, and IT professionals to better monitor and proactively manage supported storage devices to maintain optimal operation.
Three-Year Limited Warranty
As an industry-leading hard drive manufacturer, Western Digital stands behind their surveillance storage solutions with a 3-year limited warranty included with every WD Purple™ drive.
Order two hard drives only received one reported the matter and it was resolved the next day thank you CCTV trading for the wonderful service. My apologies and thank you very much.
R
Robert Burton
HDD
Easy to install and upgrade my Swann system
works as detailed
S
Stuart
Quality product. Came very quickly
Good product. Good price, happy with the shipping time
Neel and Panduka are friendly, helpful and knowledgeable. Fair prices and good range of products. Happy with my TP-Link VIGI camera system and PSS UPS battery.
Neelen was super helpful from start to finish and never tried to upsell me on things I didn’t need. Very fair pricing and honest advice. Would definitely recommend this shop. Thank you! ☺️
We respectfully acknowledge the Wurundjeri People, and their Elders past and present, who are the Traditional Owners of the land which we are located.
Supporting Local Business
By sourcing our products exclusively from local suppliers, we ensure quality, strengthen community ties, and contribute to the growth of our local economy.
Australian Standards
All products are authorized and compliant with Australian standards, ensuring top-tier security solutions that meet national quality requirements.
