A multimedia storage card system includes a memory card; a dynamic switch coupled electrically and communicatively to the memory card; a first accessor coupled electrically and communicatively to the dynamic switch for accessing to the memory card, thereby storing data into and retrieving data from the memory card; and a second accessor coupled electrically and communicatively to the dynamic switch. Upon receipt of a first access signal transmitted from the second accessor, the dynamic switch determines whether the first accessor is in an idle condition. Upon detecting the first accessor is in the idle condition, the dynamic switch is switched to and in communication link with the second accessor, thereby transmitting the first access signal to the memory card and enabling the second accessor to access the memory card in order to store data into and retrieving data from the memory card.