[计] exchangeable disk storage, removable disk storage
kě huàn cí pán cún chǔ qì ㄎㄜˇ ㄏㄨㄢˋ ㄘˊ ㄆㄢˊ ㄘㄨㄣˊ ㄔㄨˇ ㄑㄧˋ