You mean a sdhc card? Yes, but you want to make sure it is large enough to handle both the NA and the WE maps. I would suggest a 8-gig sdhc card, the faster the better, (class 4 minimum) from a reliable company. Many advertised on ebay are scams.
A 4-gig sdhc card might prove to be just too restrictive. But, once the maps are installed on the sdhc card, you can easily switch between the two by Manage Maps-->Switch maps.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.