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![Amazon.com: WD Purple 2TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD20PURX [Old Version] : Electronics](https://m.media-amazon.com/images/I/71RQa+fNNGL._AC_UF894,1000_QL80_.jpg "Amazon.com: WD Purple 2TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD20PURX [Old Version] : Electronics")
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Seagate SkyHawk 1TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST1000VX005)
WD Blue 1TB SATA 6Gb/s 7200 RPM 64MB Cache 3.5 Inch Desktop Hard Drive (WD10EZEX) - Walmart.com
