Hi! I had a strange problem with my old Macbook Pro (2012 13") that my free space on my hard drive was getting gobbled up by something, if I checked all the folders (hidden and visible) and there was nothing that could explain that I suddenly had only a few GB left. I have now a "new" computer (late 2013 15" retina) and now to my surprise I have the same problem! Please see the attached screenshots for explanation. I am quite stunned by this. My thought is that it might be due to Dropbox och Creative cloud. I have also tried doing First aid in disk utility and no errors were found. Ideas for how to troubleshoot this further would be much welcomed.