I use C:\ for only programs and OS. C;\ is a laptop at 7200rpm 14gig used and 46 free d:\ is a physical drive and I capture to it (slave drive) d:\ drop frames as it fragmanets e:\ is a 350 gig firewire drive never a problem(posted 7172 days ago)Solution capture to a fast firewire (2) drive Defrage after big deletes