4TB Seagate IronWolf ST4000VN006 NAS Hard Drive, 3.5" HDD, SATA III 6Gb/s, 5400rpm, 256MB Cache, (CMR). Seagate IronWolf 4TB NAS 3.5" SATA HDD/Hard Drive. All IronWolf drives utilize Conventional Magnetic Recording (CMR) technology for consistent, best-in-class NAS performance.
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