Simple question here... Let's say /media/storage is your primary target to mount a 1 TB hard drive. Your actual OS is running on an internal drive 80 GB in size. Of course when mounted, anything you dump in /media/storage goes to the 1 TB drive. When not mounted, anything you put in /media/storage effectively goes onto your 80 GB drive, since nothing mounted to /media/storage would make the 80 GB drive be the new home for that directory.
Is there a way to make "storage" simply not appear if nothing is mounted to it, as a clear and obvious way that your 1 TB drive is not mounted?