Media/data card

A media/data card, comprising:

• a card having a computer readable digital medium disposed thereon;
• an area of memory disposed in the computer readable digital medium dimensioned and configured for storing a plurality of multimedia files thereon;
• a data structure disposed in the computer readable digital medium having a plurality of substructures, including:
• substructures for storing data relating to identification of the multimedia files and file types;
• a user identifier;
• a file system directory, at least a portion of the file system directory being encrypted;
• a media player library containing a plurality of software modules for selectively accessing a respective one of a plurality of separate and distinct media players, the media player library including an intermediate filter driver for leveraging an internal codec of a file type associated with each of the multimedia files;
• and
• file access levels authorized by copyright holders of the multimedia files according to the user identifier;
• means for universally connecting the card to ports of portable computing devices for playback of the multimedia files stored on the computer readable digital medium;
• and
• means for reading the multimedia files stored on the computer readable digital medium.

A method for writing a collection of data files to a computer readable digital medium, comprising the steps of:

• identifying at least one data file to form a collection;
• retrieving the at least one data file;
• writing the at least one data file to a media storage substructure of the computer readable digital medium;
• writing locations associated with the at least one data file to a file system directory substructure on the computer readable digital medium;
• writing a user identifier into a security substructure on the computer readable digital medium, the security substructure precluding subsequent access to the media storage substructure when the user identifier is not furnished;
• forming a digital signature based upon the user identifier and identification data stored on the computer readable digital medium using a cryptographically secure hashing function;
• and
• storing the digital signature in the security data structure stored on the computer readable digital medium.