I believe the "updated maps" they are talking about referred to the fact that the version available for free doesn't give ability to get latest maps. And I'm pretty sure you could set up so map can be on external card (kind of worthless if it couldn't) Those reviewers probably doesn't know how (always better to have access to knowledge that hackers acquired, eh?) I'm all for supporting software developers but be aware that the version you buy will be locked to a particular contents (maps,poi's,etc...) and you will need to purchase them when new ones comes out.
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