It is easy. Just follow Garmin's MapInstall
1. Go to Garmin.com to register your new GPS and update map. You need to connect your new GPS to a USB port
2. Select install new map to both GPS device and PC
3. Run MapInstall to install map to old GPS
1. Go to Garmin.com to register your new GPS and update map. You need to connect your new GPS to a USB port
2. Select install new map to both GPS device and PC
3. Run MapInstall to install map to old GPS