If you are an old hand from the DOS days there is hope still :-)

Think of xterm as a DOS box inside Windows, except you get a "$" prompt instead of "C:\>"...

Now, you need a "#" instead of that "$". Yes, that means being "root". Fortunately it's become much easier. Just use the Application Catalog and Manager to install a package aptly named "BecomeRoot". Once you have that, in xterm just type "sudo gainroot" and voilà, there is your pound sign...

Last but not least : if you knew DOS you knew Norton Commander, right ? So look for the "Midnight Commander" package and install that.
Now, after you've done the above just type "mc" and things will look brighter :-)

PS: the place you need to be in the right pane for copying your stuff to, is below /media/mmc1/