関連ワード:  what is the function of storage unit    what is the purpose of storage units    what is the function of storage unit of a computer system    what is the function of storage device    what is the function of storage device class 4    what is the function of storage device in computer    what is the primary function of the storage unit in a computer system    what is the purpose of storage device    what is the role of storage device in computer    what is the purpose of storage device in a computer