HDD Western Digital 4TB 3.5 inch SATA III drive WD40PURX

WD Purple 4TB (WD40PURX) is a 3.5" SATA III hard drive engineered for surveillance systems. Designed for 24/7 operation, this 4 TB drive supports up to 64 cameras and is optimized to store and replay high-definition video using AllFrame 4K technology to reduce frame loss and improve playback reliability.

Advantages

The drive offers a workload rating suitable for continuous surveillance use (up to 180 TB/yr), optimized firmware for sustained video streaming, and compatibility with both DVR and NVR systems. Its 3.5" SATA III design delivers ample capacity for long-term recording while maintaining low-power 5400 RPM operation for reliability in always-on environments.

Suitable for

• Home and small business DVR or NVR surveillance systems
• Multi-camera installations up to 64 cameras
• 24/7 continuous video recording and archival storage

Key specifications

• Model: WD40PURX
• Capacity: 4000 GB (4 TB)
• Form factor: 3.5"
• Interface: SATA III
• Rotation speed: 5400 RPM
• Workload rate: up to 180 TB/year
• Weight: 0.68 kg
• Technology: AllFrame 4K (optimized for surveillance)

How to use

Install the HDD into a compatible DVR or NVR bay following the system manufacturer’s installation instructions. Connect via the SATA III interface and configure the recorder to recognize the drive. Use the recorder’s settings to allocate recording schedules, camera streams, and retention policies. For cloning or system backup, Acronis True Image WD Edition is available as a free download to clone drives and back up the operating system, applications and data.

Recommendations

For reliable surveillance performance, WD recommends using 4 TB or larger capacities for DVR/NVR deployments, keeping firmware and recorder software up to date, and selecting a drive designed for 24/7 operation such as the WD Purple series. Verify compatibility with your surveillance system manufacturer before installation.