WD Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD40PURZ (Renewed)
Brand: Western Digital
Color: New Generation Surveillance HDD

SATA - 5400rpm - 64 MB Buffer

This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com
Engineered specifically for surveillance security systems
Supports up to 180 TB/yr. workload rate
Tuned for write-intensive, low bit-rate, high stream-count applications typical to most surveillance applications
Prioritized write-operations for maximized surveillance performance