Garmin Maps Update
Recently picked myself up a Garmin Touring. Nothing fancy just something to aid with navigation and round trip routing. Garmin Express says that a maps update is available and I need a micro SD card with at least 8GB of space. The unit already has a card with only 1.3GB of space on it. If I get a blank 8Gb card and do the update on that will I need any of the stored data on the original card (excluding rides and totals etc) which are stored to the Garmin memory or van I just use the new card?