TomTom is a GPS service used in different vehicles and other hand-held devices. A TomTom reads information off of saved maps and informs you of direct driving or walking instructions. These maps save on a removable memory card. Because of this, it is possible to transfer the maps onto a different memory card and even upload the content to a different GPS device.
Plug the USB data cable into the USB port on your TomTom device. Connect the opposite end of the cable into any USB port on the computer system.
Click "Start," "Computer" and double-click the external device icon. This loads a window onto the screen, displaying all the saved maps currently stored on the TomTom GPS unit.
Click and drag the map files from the open window onto your desktop.
Insert a second USB cable into the USB port of the second GPS device and attach the free end of the cable into a USB port on the computer. Return to "Computer" and double-click the new removable device icon.
Click and drag the copied map files into the open window to transfer the information onto the new device.