You need to have MyDrive Connect installed on your computer in order to communicate with your device. If you do not have MyDrive Connect installed, see How do I install MyDrive Connect on my computer?
Click the MyDrive Connect icon ( or or ) in the Windows notification area or Apple menu bar. A small window pops up. Your navigation device should be shown as Connected at the top of this window.
If your navigation device shows as not connected, check the connection between your navigation device and your computer. more