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Western Digital's Red SN700 4TB SSDs are designed for high-endurance cache duty that helps accelerate NAS performance. Click the link below to see how reliable this drive is. : r/StorageReview
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Amazon.com: Western Digital 4TB WD Red NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, SMR, 256MB Cache, 3.5" - WD40EFAX : Electronics
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WD40EFRX-68N32N0 - Western Digital WD40EFRX-68N32N0 Red 4TB SATA 6Gb/s 5400RPM 64MB Cache (Advanced Format) 3.5-inch Internal Hard Drive - serverevolution.com
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