Internal Hard Drive Western Digital 4 TB 3.5 inch Serial ATA WD42PURZ

The Western Digital WD42PURZ is a 3.5" internal hard drive with 4 TB capacity and a Serial ATA interface, designed for surveillance storage. It is built to run in always-on NVR and DVR environments, tolerating higher operating temperatures and equipment vibration. The drive incorporates AllFrame™ technology to reduce frame loss and improve video playback, and supports compatibility with a wide range of security systems. The WD42PURZ is suitable for multi-camera setups and offers enhanced power efficiency and workload ratings compared with standard desktop drives.

Advantages

WD42PURZ is engineered for continuous 24/7 surveillance use with an MTBF up to 1 million hours and tarnish-resistant components for reliable operation. It supports workload ratings up to 180 TB/year and can handle up to 64 single-stream HD cameras on capacities 6 TB and above, while improved power efficiency helps reduce operating costs. Built-in AllFrame™ technology improves ATA streaming to minimize frame loss and enhance video playback quality. The drive is widely compatible with industry enclosures and chipsets and integrates with Western Digital Device Analytics (WDDA) for proactive monitoring and diagnostics.

Suitable for

• Small to medium NVR and DVR surveillance systems
• Continuous 24/7 video recording environments
• Multi-camera setups and systems requiring reliable video playback

Key specifications

• Capacity: 4 TB (4000 GB)
• Form factor: 3.5"
• Interface: Serial ATA (SATA)
• Model: WD42PURZ
• Hybrid cache: 0.256 GB
• Weight: 0.57 kg
• Designed for surveillance workloads up to 180 TB/year
• MTBF: up to 1,000,000 hours

How to use

Install the WD42PURZ into a compatible 3.5" drive bay in your DVR/NVR or surveillance-capable enclosure, connect to the system via the SATA interface, and format the drive according to the recorder or operating system requirements. Verify firmware and compatibility with your security system vendor if necessary. After installation, configure your recorder to allocate storage and camera streams according to your retention and resolution needs.

Recommendations

Use the WD42PURZ in devices designed for surveillance workloads and maintain firmware and system updates. For multi-bay systems, ensure proper cooling and vibration control; monitor drive health with Western Digital Device Analytics (WDDA) or compatible monitoring tools to plan proactive replacements and maintain optimal performance.