In Map Maker you load your map then export it by clicking the Exports button.
In your exports folder you will find your exported files such as the .fhm (The map), .fho (The objects), .fhw (The weather), .fhs (The sky). Find them all then put them all into a folder, compress it then upload it to mediafire or another file sharing website.
The person who downloads it must place everything into their exports folder then find the map portal in Cape.