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WD40EFRX - Used - WESTERN DIGITAL 4.0TB 5.4K RPM CLASS SATA 3.5 INCH LARGE FORM FACTOR LFF WD RED NASWARE 3.0 ADVANCED FORMAT AF 6GB/S SATA3 64MB CACHE HARD DRIVE ( 4000GB / 4TB )
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Amazon.com: Western Digital 4TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 64 MB Cache, 3.5" - WD40EFRX : Electronics
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Amazon.com: Western Digital WD40EFRX WD Red NAS Hard Drive - Hard drive - 4 TB - internal - 3.5 inch - SATA 6Gb/s - buffer: 64 MB - for WD My Cloud EX2, EX4 : Electronics
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