Seagate BarraCuda Pro ST4000DM006 4TB 7200RPM SATA 6.0 GB/s 128MB Hard Drive (3.5 inch) – Dihuni
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Amazon.com: Seagate IronWolf Pro 4TB Enterprise NAS Internal HDD Hard Drive – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage, Rescue Services - FFP (ST4000NTZ01) : Electronics
ST4000NM0023 Seagate 4TB 3.5 inch SAS Server Enterprise Hard Drive