USED Seagate BarraCuda LP ST31000520AS 1TB 5900 RPM 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive (digital video recorder model:dvr-el8240mhd) - Walmart.com
Seagate BarraCuda LP ST31500541AS 1.5TB 5900 RPM 32MB Cache SATA 3.0Gb/s 3.5" Hard Drive Bare Drive - Newegg.com
9TN154-510 Seagate Barracuda 1TB SATA 3.0 Gbps Hard Drive