The purpose of the invention is to provide a disk driver which makes it easy for users to set the settings. In a device driver which operates in the computer and has a function where each item of the device is set, when the arrangement information stored in the memory corresponding to a user is read in, the screen shows a display in accordance with it. In the arrangement settings, the user can freely arrange each of the setting items on the screen. Then the arrangement information is maintained in the computer together with the user information.