Patent ID: 7882362

Claim:
A data management apparatus comprising: a recording device that records contents data; and a data processing section that processes said contents data; wherein said recording device records therein first management data for managing said contents data according to a first reference that is a reference for exhibiting optional functions so as to enhance user's convenience upon reproduction of said contents data; and said data processing section reproduces said contents data based on said first management data, and transfers said contents data to an external device as backup data based on second management data which is used for management of said contents data by said external device according to a second reference that is a reference to have said contents data conform to a standard of a copyright protection for said contents data, wherein said second management data is composed of a main portion and an attached portion; said main portion has a main management data for transfer of said contents data to said external device; said attached portion has a data that does not constitute the main portion of said second management data, among said first management data, based on a difference between said second reference and said first reference; and said data processing section transfers said contents data to said external device based on said main portion of said second management data.