A data recording medium on which digital data including work data such as a music tune or an image is recorded in a data recording area, and on which identification information enabling identification particular to the recording medium is recorded in an identification information recording area, whereas discrimination information indicating the presence/absence of the identification information is recorded in a lead-in area. The location of the digital data recorded on the recording medium is managed in accordance with the identification information for carrying out identification proper to the recording medium recorded on the recording medium, thus realizing multiple uses of the work data, such as duplication for a plurality of times.