How to upload an existing world save

1. Stop your server
2. Get a world save you wish to play on your server. This could be a premade map from the Minecraft Community, or your own world save from your single player game.
   
   To get the save file from your single player game:
   • Open Minecraft
   • Click Singleplayer
   • Select your world save
   • Click Edit
   • Click Open Folder
   • Navigate up one directory
   • You should see your world as a single folder among the other saves you have:
   
   
3. Once you have a world save, upload it via FTP to the root folder of your server. This may take a long time depending on the size of your world and internet speed
4. In Multicraft, change the World field to the name of the folder of your world save
   
   
5. Click Save at the bottom of Multicraft, and start your server.