A method and apparatus for reproducing data is disclosed. The method and apparatus configures a composite file structure to simultaneously reproduce data recorded in a recording medium and other data recorded in a local storage, and reproduces data using the configured composite file structure. A variety of methods for configuring the composite file structure are described in preferred embodiments, such that a method for effectively configuring the composite file structure regardless of a current condition state is given. Therefore, data recorded in the recording medium and other data stored in the local storage can be effectively used.