I operate a MacBook Pro Laptop which is filling up with my sports pics. Thus to keep everything aligned in Lightroom, I moved a number of folders of images out of the laptop onto a Lacie external drive plus of course a copy of the Lightroom catalog. I simply don't know how I now make a further copy of that Lacie external drive so that it will keep it's alignment with Lightroom and thus provide me with a back-up of the original files (now on the first Lacie drive). Perhaps this is a bit basic but I'm not really a techie computer guy - any help gratefully received.