Download and install Garmin USB Drivers, turn your device on, and connect it to your computer with a USB cable. After that, right-click on your music files and select Send to > Removable Disk/Garmin device. If the device is not recognized, go to Start > Control Panel > Hardware and Sound > Device Manager and expand the Universal Serial Bus controllers list. Right-click on the drivers, select Uninstall and reboot your computer. Plug in the Garmin device and click Scan for hardware changes icon from Device Manager. Windows should automatically find and install the drivers.