See How to Share Folders (click on link)
You can share an existing folder or create one & put your shares inside. You also have options to share your downloads, your shared folder, & also to allow partial file sharing which means even if you haven't completely downlded a file others can still downld parts that you & others have to help speed up their downlds. Go to LW's menu bar, Tools>Options>Sharing for options. Also options in Upload>Basic.