Amazon.com: MDD - MQ04ABB400 4TB 5400RPM 16MB Cache SATA 6.0Gb/s 2.5in Hard Drive (15mm Thickness for TiVo or MiniPC only, not for Laptop) - 3 Year Warranty : Electronics
1N2170-567 - Seagate Laptop HDD 4TB 5400RPM SATA 6Gb/s 128MB Cache 2.5-Inch Hard Drive
Amazon.com: Seagate Expansion Desktop 4TB External Hard Drive HDD – USB 3.0 for PC Laptop (STEB4000100) : Electronics