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Seagate ST20000NM007D Exos Enterprise (X20) 20TB SATA Hard Drive w/ 7200RPM 6Gb/s 256MB Cache, Four Pack (512e)
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Seagate IronWolf Pro, 20 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage, 3 year Rescue Services (ST20000NT001) : Amazon.co.uk: Computers & Accessories
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