I've attached an emelfm screenshot.
Basically in the area I've circled in the screenshot you need to change the text from /home/tc to /mnt and hit enter - you will then be able to see the contents of /mnt
In my example the contents of /mnt in the left hand pane are:
sda1, sda2, sda3 - partitions on my laptop hard disk.
sdb1, sdb2 - partitions on a usb stick.