product_title: Western Digital Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - Western Digital40PURZ [Old Version]
product_bullet_point: Engineered specifically for surveillance security systems
  Reduced video frame loss
  Tuned for write-intensive, low bit-rate, high stream-count applications typical to most surveillance applications
  Prioritized write-operations for maximized surveillance performance
  TLER & ATA streaming support.
product_brand: Western Digital
product_text: Western Digital Purple 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - Western Digital40PURZ [Old Version]
  Western Digital
  Purple
  None
  Engineered specifically for surveillance security systems
  Reduced video frame loss
  Tuned for write-intensive, low bit-rate, high stream-count applications typical to most surveillance applications
  Prioritized write-operations for maximized surveillance performance
  TLER & ATA streaming support.