WD Purple 4TB 3.5"

The WD Purple WD40PURZ is a 3.5" 4 TB surveillance hard drive tuned for continuous video recording in DVR/NVR systems. It’s designed for multi-camera environments and engineered to handle sustained write workloads typical of security applications.

The drive incorporates WD’s AllFrame and IntelliSeek technologies to reduce dropped frames, optimize seek speeds and lower power draw and vibration. Use it in small to medium surveillance systems or as part of larger multi-bay recording solutions where reliable, 24/7 write performance is required.

Specifications

• Form factor: 3.5"
• Interface: SATA 6 Gb/s
• Capacity (formatted): 4 TB
• Cache: 64 MB
• Performance class (spindle speed): 5400 RPM
• Sustained transfer rate (host to/from drive): ≈150 MB/s
• Annualized workload rating: 180 TB/year
• Cameras / drive bays supported: Supports up to 64 cameras; suitable for multi‑bay surveillance configurations (see system requirements)
• Average power (read/write): ≈5.3 W
• Operating / non‑operating temperature: 0°C…65°C / -40°C…70°C