Well, using TOOLS / SETTINGS / MAP / MAP INFO I can see TWO identical entries listed as "California TOPO' with the grid numbers I selected, in addtion to Garmin's "City Navigator North America NT 2009" However, no matter what I select or fail to select, I cannot see anything that looks like a topo map. If I select all of them, or the Garmin map, I get my normal "street" map view. If I select only one of the Topo maps, I don't get any topo info, I simly get a stripped -down (no details) mostly blank view of my area, just showing Highway 101 and some nearby towns, and the Bay, .... no details of any sort. I've installed a 4Gig SanDisk SDHC card, but on checking the card - there are no files on it. What am I doing wrong? Thanks!