I know this has been talked about but i have no idea where to put the custom map i downloaded onto my server i know how to use FTP but i don't know which file to drop it in (I'm not that old) And my server is filled with different worlds i created
Upload your map world to the root directory, the one with your server.properties. https://www.hosthorde.com/forums/resources/uploading-an-existing-map-to-your-server.29/