The media/data card is a computer readable medium for storing data files, and in particular, media files. The device may be a flash media memory card or other conveniently sized, portable storage device. The media/data card stores a data structure for controlling access to data files stored on the computer...http://www.google.fr/patents/US7792859?utm_source=gb-gplus-shareBrevet US7792859 - Media/data card
