Please post this in the Help section next time, even though its related to tutorials it is a question and not a tutorial it self. As for looking to upload it
After finishing a map, you must export it.
When it exports all the files will be in your C:/FeralHeart/exports folder.
Copy all of those into a folder (Not into a folder from FH ~ Make a folder on ur desktop and copy the files into that)
Zip that folder. Usually just right click on it, and on tab says Send to > Compressed (zipped) folder
And place it somewhere easy to find, i usually place it on my desktop
Now go to mediafire.com
Make an account (its free dun worry)
Then under My Files Click UpLoad
A giant Plus tab will appear. click on that and itll open up a browsing to look for file u wanna upload.
Select your zipped folder of your map and begin upload.
After its done uploading copy the link and provide it to anyone you want to download ur map, and make sure they put it in their Exports folder~