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Western Digital Red WD40EFRX 4 TB 3.5" Internal Hard Disk Drive (HDD) SATA III 6.0Gb/s 5400 RPM 64 MB (20PK) | Fast Server Corp. www.srvfast.com
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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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