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BarraCuda 4TB 2.5" Internal Laptop Hard Drive, 5400 RPM, SATA 6Gb/s, Up to 140MB/s Data Transfer Rat ST4000LM024
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Seagate SkyHawk Surveillance HDD ST4000VX013 - Hard drive - 4 TB - internal - SATA 6Gb/s - buffer: 256 MB,Blue,3.5" : Amazon.co.uk: Computers & Accessories
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