Ive been a long time user of Disk Doctor and own a number of other apps by these guys and I have to say that this is the best one yet! You not only get the amazing functionality of Disk Doctor but you get FIVE OTHER APPS! This app has helped me clear almost 50 GB of junk off my computer, and has helped me figure out what files to move to my external to free up even more space. I highly recommend this to anyone who needs to free up space before upgrading to El Capitan! Amazing!