Western Digital 4TB WD Purple Surveillance Internal Hard Drive HDD
- 4 TB, 3.5 inch internal drive
- SATA 6 Gb/s, 128 MB cache
- 7200 RPM, 175 MB/s read speed
- 24x7 surveillance recording design, WD AllFrame technology
- Tarnish-resistant components
- 3-year limited warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A surveillance-class hard drive built for always-on video recording in NVR and DVR systems. It is not meant as a general desktop drive and the listing names only the drive in the box.
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ASIN: B0G6BSNYZ8Model: WD44PURZ-SPCPDY0Category: Internal Hard Drives
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Overview
Not a drive for everyday desktop use, this is a mechanical disk tuned for recorders that write video all day. WD AllFrame technology aims to reduce frame loss, and the components are engineered to handle heat swings and vibration inside multi-drive recorders.
The reason to buy is a drive designed for constant writing in an always-on camera system, with a three year warranty behind it. The limit is that nothing in the listing covers noise, power draw or workload rating.
Who it's for
Picture a camera system recording around the clock to a recorder with an open drive bay. Someone building a general computer, or needing high speed and low noise, should pick another drive type.
Pros and cons
- Built for constant video recording
- AllFrame technology for fewer lost frames
- Tested for security systems
- Not meant for ordinary desktops
- Mechanical, slower than an SSD
- Noise level not listed
- Only the drive in the box
Performance notes
Surveillance drives are tuned for steady writes from many camera streams rather than quick random access. Throughput is set by the platter speed and the interface, and the cache smooths bursts. Heat and vibration inside a recorder are where it is meant to hold up.
Specifications
| Brand | Western Digital |
|---|---|
| Model | WD44PURZ-SPCPDY0 |
| Dimensions & fit | |
| Cache | 128 MB |
| Weight | 1.6 pounds |
| Capacity & performance | |
| Capacity | 4 TB |
| Rotational speed | 7200 rpm |
| Read speed | 175 MB/s |
| Compatibility & installation | |
| Interface | Serial ATA-600 (SATA 6 Gb/s) |
| Warranty & support | |
| Warranty | 3 year limited |
| Other details | |
| Form factor | 3.5 inches |
| Specific uses | Surveillance, business |
| Drive type | Mechanical hard disk |
| Additional features | WD AllFrame, tarnish-resistant components |
| Included | Hard drive |
Frequently asked questions
What comes in the box with the WD Purple 4TB?
The drive only, according to the contents listing. Cables and mounting screws are not named.
Can the WD Purple be used in a regular PC?
The listing describes it for surveillance recorders and names desktop as compatible, but it is tuned for video recording.
Is it an SSD?
No. It is a mechanical hard disk.
What is AllFrame technology?
A WD feature the description says helps reduce frame loss and improve playback.