backup storage unit
/ˈbakʌp ˈstɔːɹɪdʒ ˈjuːnɪt/
n
English · backup storage unit中文 · 备份存储单元Español · unidad de copia de seguridadFrançais · unité de sauvegarde
意味：Storage peripheral used to copy data onto a removable medium to facilitate retrieval in the event of loss.