In a system in which DVD contents authored in the past is to be downloaded and saved into a recording disk, such DVD contents are authored in such manner that they can be recorded into the recording disk without being re-authored, and copyright protection of the downloaded DVD contents can be strengthened. In this system, a disk image file is produced including data to be handled as main data among sectors, and header information of each of the sectors. The data of the DVD contents is divided into packets of a transport stream, and identification codes for the content and for a distribution destination of the content are added to each of the packets, thus enabling identification on a basis of the individual sectors. In a recording apparatus, the DVD contents can be recorded into a large-capacity optical disk or a hard disk based on these identification codes.