This may help.
Our nuvi, zumo, dezl, RV, and LIVE devices allow you the ability to backup and/or restore the locations saved in the favorites, saved menu and routes1 on the device. To backup the favorites, saved addresses, or routes from the Garmin device:
Download Garmin Express
Connect the device
Garmin Express should detect the device automatically. If it does not, click the green refresh button on the top of the Garmin Express menu
Once the device is found you will have the option to click "save device"
If the device has already been saved you will not need to complete this step
Click device
Click back up/restore
Click back up files now
If you would like to restore the favorites, saved addresses or routes to your device select the date and time of the backup from the drop down menu, and click restore now. This will restore the favorites or saved addresses to your device.
1Routes will only be backed up from devices that support multiple stop routing.
Link referenced
-Garmin Express
http://www.garmin.com/express