System for performing a media preparation process controlled by a computer (7) further comprising a Media Preparation Module (12), a media bag (2) for storing the media in an unprepared state (13), a Dispensing Module (9, 9a) for storing the media in a finally prepared state (17), and a water providing system which connects the Media Preparation Module (12) with the media bag (2) and the Dispensing Module (9, 9a) and provides them with temperature adjustable water using a water sterilization filter set (4) wherein, the system (6) additionally comprises an attachable machine readable data storage (3) which contains information about the current state and/or operating parameters of the system parts, which are read, processed and used by the computer (7) to operate the system (6) according to required conditions.