A removable-medium apparatus having a memory unit that stores a plurality of ID information for accessing a removable medium, and a receiving unit that receives an instruction for specifying ID information from among the plurality of ID information stored in the memory unit. The removable-medium apparatus determines whether or not ID information that is entered matches the ID information that is specified by the receiving unit, and outputs data that is stored on the removable medium when it is determined that the entered ID information matches the specified ID information, and does not output data that is stored on the removable medium when it is determined that the entered ID information does not match the specified ID information.