OK so you're sorted then it would seem. Create the Garmin folder in drive E then if it hasn't been created by the unit itself already, re-boot it, then hook up to WebUpdater to get whatever files it offers. You'll also need a basemap, the one from your backup should be ok or if it's old you can get the latest from here: [Only registered and activated users can see links. ]. Then connect to MapUpdater to reload your detail map. Sincere advice, never use GarminExpress again, only WU & MU. Don't load anything from your backup unless you're sure none of those files are guilty of bricking it before.