Amazon.com: HGST Travelstar 7K1000 2.5-Inch 1TB 7200 RPM SATA III 32MB Cache Internal Hard Drive 0J22423 : Electronics
maxdigitaldata 8tb 7200 rpm 256mb cache sata 6.0gb/s 3.5" internal hard drive for nas network storage (md8000gsa25672nas) - 3 years warranty - Walmart.com
Seagate Exos 7E2000 2TB 512e SATA 6Gb/s 7200 RPM 2.5-Inch Enterprise Hard Drive (ST2000NX0253) Laptop Internal Hard Drives - Newegg.com
Seagate Exos 7E2000 2TB 512e SATA 6Gb/s 7200 RPM 2.5-Inch Enterprise Hard Drive (ST2000NX0253) - Newegg.com