HP - 1st HDD bay - 1TB Internal - 2.5″ SFF - SATA 6Gb/s -7200 rpm
Amazon.com: Seagate BarraCuda 1TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 7200 RPM 64MB Cache for Computer Desktop PC (ST1000DM010) : Electronics
Seagate BarraCuda 1TB 7200 RPM SATA 3.5" Hard Drive - Newegg.com
Dell 1TB 7200 RPM SATA 3.5in Hard Drive | Dell USA