Well, you need winRAR or 7zip with these you're going to right click on you're desk top and it'll show you New winrar folder click on that and it'll create a winrar folder, you can rename it and every thing. So now you need to go to %appdata% and that will take you to Roaming, now you'll see .minecraft click on that and then there will be a saves file. Now drag out the map out of the saves file into that winrar file MAKE SURE TO NOT HAVE YOU'RE MINECRAFT RUNNING WHEN DOING THIS!!!! and then when that is done you need to sign up on mediafire.com for the files/upload files. so When you're done signing up you will see a upload file on the website, click on that and now make you're website icon smaller and drag the winrar file into the upload file. when that is done right click on that file that you just uploaded to there website and you'll see a Copy link thing. Now copy it and go to projects on PlanetMinecraft and scroll down to World URL and right click there and it'll show paste now do paste and it'll paste map..... There you go! :D