Abstract: A method for storing additional data relating to menu data, particularly to thumbnail pictures, on optical media, e.g. Blu-ray discs, complies with the current standard for Blu-ray rewritable discs, which allows storage of content management information, e.g. thumbnail picture data, on dedicated locations on the disc. The method includes using relevant standardized files on the disc and relevant standardized parameters for accessing the data. In particular, the remaining part at the end of a data block within the thumbnail data file is used for storing additional data relating to the corresponding thumbnail picture data. The additional data can be used e.g. for further menu processing, or any form of content management.