I have a second drive in my computer that the computer knows as /dev/sda1. (/Home and / are on /dev/sdb.) There is a folder 'Data' in /media/jjj/, which is where I want to mount /dev/sda1. But when I use the command 'sudo mount /dev/sda1 /media/jjj/Data' the mount command creates a new folder /media/jjj/Data1 and mounts /dev/sda1 in it. Why?