
Western Digital WD20EFRX 2TB 3.5-inch SATA 6Gb/s 64MB Cache Hard Drive,
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Amazon.com: Western Digital 2TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5,
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Amazon.com: Western Digital 2TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5,

Western Digital 2TB WD NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5,

Amazon.com: Western Digital 2TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5