In order to save space on my laptop, I'd like to install a bunch of my lesser used programs on an external hard drive (Plex, Grageband, imovie, etc...) I don't really know how to do that. It seems that so many programs need to be installed on the same drive as the OS. Can anyone help me? Point me in the right direction? am I going to have to learn how to "symlink" (whatever that means) for applications like garageband?