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Astro does have profiles.
I tried switching between profiles but the same thing continued happening. 

I have an Astro320, I have tried and tried again to load the NE topo United States Parts 1 and 3 onto this unit.
I have put the map files on the unit's internal memory and I have tried on an sd card. I have deleted the files and reloaded them. Every time I load the the maps they don't display all of the the detail as they should. The most detail that I have achieved is the lakes and stream will show up but nothing else.
When I see the data on Basecamp, it shows up with all of the topo, cities, roads etc. (all of its map glory). When I take the loaded sd card out of the Astro 320 and insert it into my Rhino650 or Oregon600 I get all of the the map glory! When I take the same sd card back to the Astro320 I see no map glory.

HELP! I don't know what is wrong here. I'm about to call Garmin (I feel like they will just tell me to buy their maps).

Thanks

Did you ever have any luck figuring this out? I have an Astro 320 as well and I am having a very similar issue.

I have loaded maps onto an sd card and they show up as an map with incomplete data. When I put the sd card in on of my other gps units (Oregon600 or Rhino650) the maps work just fine.

I am stumped on this one.