How to unmount after using mount --bind option

I have mounted a hard disk /dev/sda1 on /media/backup. Further, I have issued the following command: mkdir /home/users/Desktop/backup sudo mount --bind /media/backup /home/users/Desktop/backup   This allows me to access "/media/backup" from "/home/users/Desktop/backup" as well. However, now I would like to remove the "--bind" from "/home/users/Desktop/backup".    umount /home/users/Desktop/backup will remove the bind between the 2 folders. You can then check /home/users/Desktop/backup to make sure that the bind is gone and remove the folder if you wish.