If you use the list command, "ls", you can see the directories and other files on your current location. If you want more help, type in "man ls". I assume your distro has man pages installed but maybe not. If not just google, "man ls". I like to use "ls -hilt" which will list in an easy to read format
So now you know what is at your current location. So type "cd [some location]" to go to [some location].
Now I think you want to find out where your USB drive is. Well, I suggest typing "ls ../../" and DON'T hit Enter. Hit the TAB and you should see the structure of the directory above your home directory. Does this make sense? OK, now complete "ls ../../" with a directory you would like to search. The "../../" means one-up.
Hmm, I found a website that might better explain:
http://arachnoid.com/linux/shell_programming.html
I think it would be useful for me too.
Linux is best!
Thanks !!
Super help link this arachnoid page !