Maxtor onetouch 3 on my mybook -. the hard drive shows up but will not let me write. At the shring

Question

the hard drive shows up but will not let me write. At the shring and permissions it just read: read only. This is a brand new hard drive out of the box. I'm just tring to back up some final cut projects. will not even let the file in. Cannot modify the untitled harddrive...... thats what it says when you try and drag a file in.. thanks for the help..