I am new to my iMac-can someone tell me how to see the total disc space and used disc space? Also, a list of what is taking it up? I loaded my iTunes and some photos. I have had this iMac for a while but have been slow to migrate over. I am starting today! Can someone also tell me how to set up a folder organization table. I cant figure out where to find hard drive and create folders for home, work, MY Personal files. thanks!