You have an opportunity to select the application data folder during install but if you miss that, you can also migrate the application data folder to a new location: use the "Utilities" menu from the top menu.  I wouldn't suggest putting the application data on a network location.  That could cause all sorts of problems if the network location isn't available when you try to use Qimage.  And it will drastically slow down performance.  I'd recommend using another local drive if you want to put data somewhere else.

Regards,
Mike