I recently purchased a Drivesmart 60 but when I inserted my Garmin preloaded 2GB card South Africa map it does not recognise the card, i.e. no map. Garmin support tell me that the Drivesmart does not recognise SD cards under 4GB? I contacted Garmin UK and they tell me that is not correct?? Can anyone shed some light here please as Garmin don't seem to know!