What Windows edition do you have?
Maybe this will help.
http://www.addictivetips.com/windows-tips/how-to-view-change-default-install-location-of-windows-8-store-apps/
There is one little issue with changing the default installation directory of Windows Store apps. The apps installed before changing the default directory will have their data in the original location and updating these apps will produce an error. In order to avoid receiving the error, you can uninstall and reinstall all current Windows Store apps to relocate them to the new default location.