WD WD102PURZ 10TB Purple 3.5" SATA3 Surveillance Hard Drive - Built for 24/7 Use - Form Factor: 3.5" - Total Capacity: 10TB - Advanced Format - RoHS Compliant - Cameras Supported: Up to 64 - Cache: 256MB - Performance: 7,200 RPM - MTBF: 1,500,000 Hours - WD102PURZ - 3 Years Limited Warranty