Patent ID: 8254216

Claim:
A content copying system including a plurality of devices cooperating to copy a content piece to a removable recording medium, the plurality of devices including a first device and a second device, the first device comprising: a creation unit operable to create a content list, the content list being a list of a plurality of content pieces held by the plurality of devices in the content copying system; a reception unit operable to receive, from a user, a designation of at least one content piece to be copied to the removable recoding medium from among the content pieces listed in the content list; an obtaining unit operable to obtain at least one content identifier in one-to-one correspondence with the at least one content piece to be copied from the plurality of devices; and a writing unit operable to write first management data to the removable recording medium, the first management data including the at least one content identifier obtained by the obtaining unit, and the second device comprising: a storing unit operable to store at least one content piece; a generation unit operable to generate at least one content identifier in one-to-one correspondence with the at least one content piece stored in the storing unit; a reading unit operable to read the at least one content identifier included in the first management data from the removable recording medium; a judging unit operable to judge whether the at least one content identifier generated by the generation unit is included in the at least one content identifier read from the removable recording medium; and an additional writing unit operable, when a content identifier generated by the generation unit is included in the at least one content identifier read from the removable recording medium, to copy a content piece corresponding to the content identifier to the removable recording medium.