Quote Originally Posted by catymag View Post
Mapsource data file (MS now is discontinued and can give routing errors if you build your img with it, use Basecamp/Mapinstall now) is pc install files version.
Img is file ready to copy in gps device. It needs to be unlocked.

sent with my phone
Right i add just a small thing , mapsource is okay for older navi standalone type 205W 200, 300, 255 etc.