"[0017] In the present invention, a predetermined file format can be used to store the digital media content. The predetermined file format can be configured to be incompatible with the file for mats used by major computer operating systems, such as Windows, Linux, Unix, and Apple's operating system. The predetermined file format can allow digital media content to be saved on the digital storage medium 114 without allowing easy access to the digital storage medium by external devices controlled by these operating systems. Since the predetermined file format is not compatible with the storage format used by these operating systems, the digital media files stored on the digital storage medium can be substantially secure." doni