This invention concerns a data storage medium in the form of a CD (1) which is writable one or more times. The CD (1) consists of a disk-shaped CD body with a layer (3) for data storage and a chip (12) and a CD coupling element (11) for contact-free transmission of data between the chip (12) and a data processing device. The CD coupling element (11) can be designed as a coil, an electrostatic coupling surface or as an optical coupling element. For reading out the data stored on the data storage layer of the CD (1), the CD (1) can be inserted into a CD drive. The CD drive has a drive coupling element (51) which similarly to the CD coupling element (11) is designed as a coil, an electrostatic coupling surface or as an optical coupling element and sends to or receives data from the CD coupling element (11). In one embodiment of the invention, the CD coupling element (11) is not integrated in the CD body, but in a pressure plate (65) of the CD drive which revolves with the CD (1) and contacts contact surfaces (6) positioned on the CD (1) to establish electrical contact with the chip (12) of the CD (1).