I'll be curious to see other folks input also. I have a 478, 512mb blank memory chip and have tried to download my TOPO 2008 info to the chip. It appears that the maps made it but the gps does not show the topo
I'm probably just not turning something on or off or whatever. Operator error. I would think you could see all of the info on the DVD on the computer because I can with TOPO 2008. I could only find 512mb on the top end of the storage scale. I too want to add inland waters so let's see what everyone else has to say.