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WD Red Pro WD4003FFBX 4TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive - Newegg.com
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WD4001FFSX | Western Digital Red Pro WD4001FFSX 4TB 7200RPM SATA3/SATA 6.0 GB/s 64MB Hard Drive (3.5 inch)
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