HP - 1st HDD bay - 1TB Internal - 2.5″ SFF - SATA 6Gb/s -7200 rpm
Amazon.com: Seagate Barracuda 3TB 7200rpm SATA III Internal Hard Drive (ST3000DM001) : Electronics
Seagate IronWolf Pro 20TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD NE-ST20000NE000 Desktop Internal Hard Drives - Newegg.com