The title may not be the best, but I couldn't figure out how to ask my question in the title. Here's the problem: I have an external hard drive that used to be the hard drive in an ibook, I think. I am now going through and cleaning it out. I have completely cleaned it out, to where when I connect it, it shows that nothing at all is on it. However, it says that there is still about 25 gb being "used". I'm not a huge techie person, so I'm really not sure why. Here's what I want: 1 - If there's still anything on there, I want to find it and see what it is before I completely erase it. 2 - I want to get everything on it completely erased for security reasons and to get it like new. I think I can use disc utility for this? Not positive though.