if u just post it its not downloadable.if u wanna make it downloadable go into the start button in the corner of the computer search %appdata% click on roaming go into .minecraft go into saves copy the map file u wanna upload go to mediafire.com make an account and drag the file u wanna make downloadable into the middle of the page and press u and it will upload the file then after its uploaded u clik the download link on the file and u copy the page name example:www.planetmincraft.com and where it says download url on the editing page for ur project u post the link and u save the project and then it wil be downloadable.:D