secondary hard disk drive
/ˈsɛkəndəɹi ˈhɑːd ˈdɪsk ˈdɹaɪv/
n
English · secondary hard disk drive中文 · 副硬盘驱动器Español · unidad secundaria de disco duroFrançais · lecteur de disque dur secondaire
意味：Device used to play and record data on a secondary hard disk that complements the primary hard disk. hard disk drive