Have a Mac mini that I bought about 6 months ago. It has a 500GB HD but I have now filled it up. When I look at the properties it has something that is 286GB in the Other category. I have a 1.5TB external hard drive running Time Machine so if it is a backup of some sort, I don't need it on the Mac. What is my best option to find this file? I think I should be somewhere in the 250GB range at this point. Any help is appreciated.