As the title stated, I am missing hard drive space on my Hard Drive Disk. The SSD did fine but the Hard Drive is missing some space. I don't know what is causing this as I only have 100 MB out of the 350 GB which is insanely low and I can not store anything on there. Could it be my anti virus that screwed it up? I don't know and really need to earn back my desperate space as 64 GB on the SSD is just not enough.