Multiprobe data systems have been developed for data storage. The systems can be applied for parallel scanning probe microscope, parallel electron beam exposure system and so on. Electrical recordings to a ferroelectric material and a conductive polymer have been performed. The conductive polymer film used as a recording media is 7nm thick doped polyaniline. The film conductance is reversibly modified by electrochemical oxidation and reduction and this phenomena can be used as a recording media for rewritable data storage.