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  The Western Digital WD Purple 3TB SATA 3.5" Internal Hard Drive is a specialized hard drive designed for use in surveillance systems. It is part of Western Digital's "Purple" line of hard d..
  
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The Western Digital WD Purple 3TB SATA 3.5" Internal Hard Drive is a specialized hard drive designed for use in surveillance systems. It is part of Western Digital's "Purple" line of hard drives, which are optimized for continuous recording and 24/7 surveillance use.
  Some of the key features of the WD Purple 3TB hard drive include:
  3TB of storage capacity, which is ample space for storing large amounts of 
  surveillance footage.
  SATA 6Gb/s interface, which allows for fast data transfer rates between the 
  hard drive and the surveillance system.
  3.5" form factor, which is a standard size for internal hard drives.
  64MB cache, which helps to improve the performance of the hard drive by 
  temporarily storing frequently accessed data.
  In addition to these features, the WD Purple 3TB hard drive is designed to 
  withstand the demands of continuous recording and playback. It includes 
  features such as AllFrame technology, which helps to reduce frame loss and 
  improve video playback, and TLER (Time-Limited Error Recovery), which helps 
  to prevent hard drive errors from disrupting video recording.
  The "bulk" designation for this hard drive means that it is sold without any 
  packaging or additional accessories, and is intended for use by system 
  integrators and other professionals who will be installing the hard drive 
  into a larger system
  
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