[Claghorn]

Been trying to find a setting or tweak that would avoid cluttering up my computer's library with mobi copies of epubs I send to my kindle paperwhite. Is there such a setting? If not, can we get one? It doesn't take much time to do the conversion if I need it again, and I'd rather save the space. No doubt I can do the delete manually (unless that makes calibre also delete it off the kindle the next time I plug it in?)