Here is something I found how to do on the web
www.howtogeek.com/.../hide-removable-drive-icons-from-your-ubunt\
u-desktop/

If you cant read it here is the way

Press Alt+F2
Type in gconf-editor and hit run

Now browser too
apps \ nautilus \ desktop

You should see a key in the right-hand pane called volumes_visible. Remove the
checkbox from it, and the icons will instantly disappear from the desktop.
Remember that you can always access the drives from the "Computer" icon, or
easily in the file browser.

If you have any other questions by all means give a shout too the community