Hello, Quote: "I didn't think that the map file that I downloaded from Navicore had to be unzipped." I was also confused as to where the extracted files went to. I found my map "mapdata_USA West" in a folder named Navicore on my PC after I did the extraction. Now a new question. In any of the mapdata folders there are files that have the extension .qt which is for Quick Time Movie. I tried to open these files even on my PC but get error messages. Do these files do anything and can they be deleted to free up space? Thank you.