Importing audio wav files

I downloaded a mix template in Cubase 8.5. How do I import audio into each track where there are plugins and settings already. When I import a new track is created. I would like to drag and drop files. Thanks

And why don´t you just do that?

Tried that, I just get the little circle with a line through when I try to drag a wav file from either my desktop or from from a Cubase session

Are you running Cubase as admin? If so, it won’t let you drag ‘n’ drop from Explorer/Desktop.