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Hooray!! The update did the trick! I can now see the topos. Thank you very much!!

One other thought: We know the GPS and its micro card reader are working properly as it reads the Blue Chart chip when inserted. We also know the maps were loaded properly onto a new card which was properly formatted. Could there be a problem with the new card? It is a Monster 8GB microsdHC w SD adaptor. Should I try a different card?

I very much appreciate you continued efforts. To date, I did use MapSource as you suggested to load NEtopo part 1 onto the micro SD. Could not see it on the GPS. But it was 628MB. The Blue Chart preloaded MicroSD which I can see is only 128MB. Reformatted the micro card and then used MapSource to load a toal of 3.1MB maps. Still cant see. Frustrating.

It is formatted FAT32. It has a garmin folder which has a 600 + KB IMG file labelled gmapsupp.

Followed tutorial precisely. Downloaded maps (3) to BaseCamp. Then plugged in 8GB micro SD inSD adaptor (after it had been formatted). Picked all of the topos (600+ MB) and used Mapinstall to install maps. They are on the micro card as an IMG file. Have a prior 128MB Garmin micr card with BlueCharts. That shows up fine on the GPS. New micro card does not show up.

downloaded NE topos (3) to microSD card. Verified that correct amount of data was present but when inserted in GPS and went to "Map; information" no maps were found except marine map in internal storage