Don't download straight to hard drive

Think there’s something with the hard drive…More than once I downloaded straight to the hard drive via bitorrent (big movie files) and once completed, the movie didn’t properly play. When I rechecked the file with utorrent (which took forever, slow read speed) the file was not finished. This just happened with a file that was 100% and after rechecking it is 20%… what happened to that 80%? That’s 3 gigs just gone. 

I thought it would be cool to just download straight to the hard drive, but it seems that the internal hard drive isn’t very good, so I recommend using an external and copying it over. Haven’t had any issues with copied files.