Thanks, David,
Your response made sense and I tried it….i.e. saved the file on my separate media drive….and indeed that is where the project file wound up.
However, when I subsqeuently rendered an embedded motionclip, I got the same location of render files as I described in my original post.
Apparenly that “Send To Motion” dialogue box applies only to the Motion related project file only.
So….still looking for how to get my embedded motion clip renders to go to my seperate media drive.
Clyde