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Amazon.com: Western Digital Purple 3TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD30PURX [Old Version] : Electronics
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Amazon.com: WD Purple 3TB Surveillance Hard Disk Drive -5400 RPM Class SATA 6Gb/s 64MB Cache 3.5 Inch Model WD30PURX : Electronics
Amazon.com: Western Digital Purple 3TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD30PURX [Old Version] : Electronics