The present invention relates to a means, system and method for controlling the storage space required by a storage means which contains information items associated with an information transfer application. The structure is capable of illuminating via at least one luminous region of at least one of the main faces, an element having a reflective surface that reflects visible light, placed facing at least one part of the luminous region. A thin potential barrier layer is deposited at the interdigitated electrode pattern structure. The method includes retrieving server configuration information for a server computing device, the server configuration information including a set of available versions of the API method. The intermediate carrier is developed by the application of toner and the toner is transferred to the print medium.