To provide a user friendly information processor having such versatility that the processor can be connected with an external device and capable of transferring electronic information from one recording medium to another.

When a control means 16 detects that a memory card equipped with an adaptor is fixed to a PC card slot part 11 to enable read/write of electronic information and that an MO disk is fixed to an MO disk slot part 12 to enable read/write of electronic information, the control means 16 makes a monitor 19 to display a message indicating the possibility of electronic information transfer on a monitor 19. A user understands at a glance, by watching the display, that transfer of current electronic information is possible, and understands that the transfer is started by pressing a copy button 13.