I have 2 - 128gb crucial m4's in raid-o with windows 7 ultimate 64bit. One second I had Plenty of free space on the 256gb raid-o configuration. I wasn't even paying attention because I haven't installed anything. because I have all my games on a 1.5tb hard-drive, Movies on a 1.5tb hard-drive and my music/pictures/etc on a 500gb hard-drive. I had plenty of space free on my C: drive. I Went to my computer in the living room to put some music on running off this computer via 500gb hard-drive come back to this computer and I have 998mb free on the C drive error? any suggestions