My hard drive space steadily decreases each week without adding any significant files. People suggested it was my back ups, but as shown below, I don't think this is the reason based on the picture attached. I ran a disk map utility, and in my personal folder which as all my data including documents, iTunes, drop box and all that, it is taking up 109 GB, but only 60 gb is actually accounted for in the utility. Does anyone know where these hidden files might be? Any help would really be appreciated, I am running out of room. Thanks!