Data recorder

A data recorder comprising:

• a built-in medium recorder that records data in a built-in medium;
• a portable medium recorder that records data in a portable medium;
• a control section that has an individual recording mode for independently recording data in the built-in medium and the portable medium and a simultaneous recording mode for simultaneously recording identical data in the built-in medium and the portable medium and that controls the built-in medium recorder and the portable medium recorder in such a way that data are recorded in either of the modes in accordance with a selection instruction;
• and
• a storage section that stores relevance information for associating with each other, among areas in the built-in medium and areas in the portable medium, areas where data are to be recorded simultaneously, wherein,
• when the simultaneous recording mode is instructed, the control section locates areas in the built-in medium and the portable medium where data are to be simultaneously recorded, by use of the relevance information stored in the storage section and controls the built-in medium recorder and the portable medium recorder so as to simultaneously record data in the thus-located areas.