I've got an external SSD drive to work with Lightroom CC even to have installed all Creative Cloud suite. I've configured Lightroom CC to work with an externa drive too, buy it always creates a "Lightroom Library.lrlibrary" file in my ~/images/ folder witch fills my internal Hard Drive constantly. What can I do?
Nothing. That is how it is supposed to work. You can define a location for Lightroom to store temporary copies and originals if you want to save a local copy of your originals, but you cannot define the location of the Lightroom library cache. It is hardwired to your Pictures folder.