I have Destiny installed on my internal hard drive. There is a Destiny update that I am trying to install, but I get an error that there is not enough space on my internal drive. I have installed a 2TB expansion drive, but the update will not install to the external drive even though it is recognized by the system. Do I have to move the entire game to the external for the update to install? If so, how do I do that without losing my saved data?