Have an old C320 and frustrated by the old maps in the unit display?  I no longer am using the C320 so I am selling the updated version of the maps that I had in my unit.  They are on a SD card that pops into the side of the unit.  The maps (North America) were updated in 2013 almost 10 years after the original C320 came out.  The item for sale is the SD card with the maps, the Garmin unit is not included.