primary hard disk drive
/ˈpɹaɪməɹi ˈhɑːd ˈdɪsk ˈdɹaɪv/
n
English · primary hard disk drive中文 · 主硬盘驱动器Español · unidad de disco duro primarioFrançais · lecteur de disque dur primaire
意味：Device that reads and records data on the primary hard disk; it is the main storage medium for programs and data. hard disk drive