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I have a few questions about the Alpha. What does the sd card do in this unit? I know on 320 it has the map on it.
The wife and I each got Alpha at the same time and haven't added anything to them but on the map mine has the TOPO lines and hers doesn't can someone help us out on that Thanks, Wade
On the alpha the topo map is on it from the factory. If hers is not showing up go to maps and make sure it is on. The SD cards are used to add additional features like birds eye or other maps because the internal memory is limited and the more you put on the Internal memory the slower unit will run.