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Amazon.com: Seagate BarraCuda 4TB Internal Hard Drive HDD – 3.5 Inch Sata 6 Gb/s 5400 RPM 256MB Cache for Computer Desktop PC Laptop (ST4000DM004) : Electronics
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Seagate Enterprise Capacity 3.5'' HDD 4TB 7200 RPM 512n SAS 12Gb/s 128MB Cache Internal Hard Drive ST4000NM0025 - Newegg.com
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