Turn on your Street Pilot c340 and navigate to the "Map Info Page." This page will tell you the latest map installed on your device. This page is located in the resource section below.Click "View map updates for this product." This will tell you the latest version available for your device.
It's not just for driving, though; you can use it while hiking, camping, geocaching, orienteering and more.First, is the MSRP for numaps lifetime map updates.Amazon and others will sell the lifetime updates from the mids-mids. The c340 is a model with 2 GB of internal storage and the c530 has just 1 GB: You should check and see how much storage your c580 has.I'm not sure what type of mapping you are looking for but check out this site: They offer a variety of mapping options at no cost. My older c340 recognizes the map "City Navigator North America NT 2013.40", but my newer c580 does not. 2013.40 is too tight a fit on the c580's internal memory, but 2013.10 is 220M smaller and fit just fine.