WD Purple 4TB Internal Hard Drive, 3.5-inch

Reliable surveillance drive for 24/7 continuous operation – optimized for NVR/DVR, quiet and energy-efficient

• Capacity: 4TB
• Size: 3.5"
• Speed: 5400 RPM
• Interface: SATA III 6Gb/s
• Cache: 128MB
• Supports up to 64 cameras per drive
• Purpose: 24/7 security systems
• Series: WD Purple

Who it's for

• Specifically built for continuous video surveillance systems — digital video recorders (DVR) and network video recorders (NVR).
• Ideal for businesses, stores, offices, and smart homes that need reliable, stable storage.
• Handles sustained write workloads from multiple video streams very well.

Key advantages

• High reliability in around-the-clock recording scenarios, calibrated for sustained write rates.
• Quiet operation and power efficiency for minimal impact on system heat and noise.
• Surveillance-focused firmware that helps reduce dropped frames and improve video stability.
• Support for up to 64 cameras per drive, enabling flexible system expansion.
• Broad compatibility with enclosures and modern SATA interfaces.

Main specifications

• Storage capacity: 4TB
• Physical size: 3.5 inches
• Rotational speed: 5400 RPM
• Interface: SATA III at 6Gb/s
• Cache: 128MB

Compatibility and installation

• Install in standard 3.5" bays in desktop PCs, DVR/NVR units, and storage enclosures.
• Supports systems with multiple bays, including solutions with more than eight bays.
• Ensure the host supports the SATA interface and appropriate power connectors.