I nearly filled a 120GB hard drive with Poser stuff, then it died. Now there is a 160GB hard drive, and I'm busily reinstalling a bunch of stuff. I do back up to DVD, but hard drives often have a habit of dying at the wrong time. Yes, I recommend DVD burners since they hold lots more. I have Poser 5, and external Runtimes. Some of them can be backed up to DVD without the need to zip them.