WESTERN DIGITAL WD Red NAS Hard Drive WD40EFAX - Hard drive - 4 TB - internal - 3.5" - SATA 6Gb/s - 5400 rpm - buffer: 256 MB | Synigo
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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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