DS80HKAI-VX1

 Industry Standard 3.5-inch 26.1 mm Height Form Factor
 7200 rpm Performance, SATA 6 Gbit/s Interface
 Industry-standard 3.5-inch form-factor
 Designed for 24x7 operation
 256 MB Cache buffer helps to smooth video recording and guard against frame drops
 550 total TB transferred per year workload rating