Brand
WD
Series
Purple
Model
WD40PURZ
Packaging
Bare Drive
Performance
Interface 
SATA 6.0Gb/s
Capacity
4TB
NAND Flash Memory Type
Hard Drive
RPM 
5400 RPM
Cache 
64MB
Features
Features
Capacity up to 18TB.

Engineered specifically for surveillance security systems.

Tuned for write-intensive, low bit-rate, high stream-count workloads typical to most surveillance applications.

8TB and above have additional enhancements and higher workload rate for AI-enabled recorders, systems and solutions.

Supports up to 180 TB/yr workload rate (Up to 360 TB/yr workload rate on 8TB, 10TB, 12TB, 14TB and 18TB drives).

Support for more than eight bays.

Tarnish-resistant components.
Usage
For Video Surveillance
Dimensions
Form Factor 
3.5"
Height (maximum)
26.10mm
Width (maximum)
101.60mm
Length (maximum)
147.00mm