Lightroom :: Defining The Location Of The Second Copy?

`I have recently upgraded from Lightroom 3 to 5. One of the triggers for doing this was getting a Canon G15; and the fact that my previous workflow didn't work for the CR2 files that it produced. (Previous work flow [Mac Mini ... a bit creaky now, running OS 10.7.5]: Use Nikon's importing tools to import photos to folders & create back up at same time [external drive] Use Preview to select & just do basic editing if needed [e.g. cropping]), import (add, rather than move/copy) to Lightroom - though often I'd wait for a bit & do quite a few groups at at time, especially if Preview was ample for what I wanted to do at the time. While the Nikon import tool was fairly agnostic about JPEGs, it naturally didn't recognise the CR2 files
 
The Canon software wouldn't create the backup files that I liked. I've also experimented with Image capture, but again, no luck with creating the backup
 
So, on the upgrade to lightroom 5, I have started to look at using Lightroom (though it takes forever to load compared to Nikon / Canon offerings). I have now discovered, however, that the backup that Lightroom does creates folders named "Imported on 28 July 2013" - rather than the 2013-07-28 folder structure that I use elsewhere. I can't find a setting to let me create the backup folders based on the same structure as the main import.
 
(The only option I can think of at present is to use Carbon Copy Cloner & run it daily on the regular destination, unless others have other ideas ...)
 
[Time Machine runs, but I also want to have the photos in a way I can easily access them from Windows etc., as well as Mac. And I'm a bit of a back up freak. I like plenty of the things. Just In Case]