Abstract: An example system includes a contactless communication part that performs contactless communication with a data storage medium having a contactless communication function; a data writing part that writes data to the data storage medium by the contactless communication part; a storage part that stores the data written by the data writing part; and a data determination part that determines whether the data stored in the data storage medium and the data stored in the storage part have a predetermined relationship with each other or not. When the data determination part determines that both of the data do not have the predetermined relationship with each other, the data writing part overwrites the data stored in the data storage medium with the data stored in the storage part.

Abstract: An example system includes: a contactless communication part that performs contactless communication with a data storage medium having a contactless communication function; a data writing part that writes data to the data storage medium by the contactless communication part; a storage part that stores the data written by the data writing part; and a corruption determination part that determines whether the data stored in the data storage medium is corrupted or not. When the corruption determination part determines that the data is corrupted, the data writing part writes the data stored in the storage part, to the data storage medium.

Abstract: An example system includes: a contactless communication unit for performing contactless communication with a data storage medium having a contactless communication function; a data acquiring unit for acquiring data stored in the data storage medium by the contactless communication unit; a display processing unit for displaying at least one content stored in a content storage unit and a content according to data acquired by the data acquiring unit on a display unit as selection objects; a selection accepting unit for accepting selection by a user for a content displayed by the display processing unit; and an information processing unit for performing information processing pertaining to a content, which is an object of selection accepted by the selection accepting unit.

Abstract: A video game device 10 is capable of receiving both a first storage medium and a second storage medium at the same time. The video game device 10 performs a first game process using first save data. The video game device 10 performs a second game process using second save data. The video game device 10 overwrites the first save data based on the status of the second video game. The video game device 10 overwrites the second save data based on the status of the first video game.