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Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5,

Western Digital RED WD40EFRX 4TB 64MB Cache 3.5,

WD WD40EFRX-68N32N0 - 4TB 5.4K SATA 6.0Gbps 3.5,

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