When you remove the SD card with map data while navigation is active, a
popup informs you that navigation will not be available anymore until you
re-insert the SD card with map data. After you confirmed the popup the
home screen will be shown. If a SD card with map data is re-inserted, a
loading popup is shown in case you are still in the navigation application
(same behaviour as for system start up).
• Press on the inserted SD card to unlock it.
• Pull the SD card out of its connector.
• Gently slide the new SD card into the SD card slot with the label side up and
the cut-outs to the right.