I opened up a terminal window. In my user folder, there were already folders called "Music", "Pictures", "Documents" and "Vidoes". I wanted to use those folders so I didn't have to create more. If they didn't exist though, they could be created using the command:
mkdir musicMusic
Then of course repeat the command replacing the word "musicMusic" with "picturesPictures" "documentsDocuments" and "moviesMovies" or "videosVideos".
Now time to mount.