Western Digital WD4000FYYZ-36UL1B0 WD Re 64MB Cache 4.0TB 3.5" Sata Hard Drive - Effective Electronics
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WD4000FYYZ-01UL1B2 Western Digital RE 4TB 7200RPM SATA 6Gbps 64MB Cache 3.5-inch Internal Hard Drive
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Western Digital RE WD4000FYYZ 4TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Enterprise Internal Hard Drive - w/3 Years Warranty - Walmart.com
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