Abstract: There is provided, according to the present invention, a reproducing device capable of preventing illegal duplication and reproduction, as well as of reproducing content without degrading the quality of the audio and visual contents. The reproducing device (100) comprises a first storage area (110), in which data is stored, using file system which is not supported by operating system of the reproducing device, an interface part (120) supporting the file system which the first storage area uses, accepting only reproducing request, reading out and supplying the data stored in the first storage area, wherein the reading out and supplying operations are hidden, and a reproducing part (132) reproducing the data supplied by the interface part.