Video Capture?

I was doing a video capture of a Face-to-Face course.  After about 2hours it came up on the screen saying "Saving...100%" and has just stayed on the screen while the presenter kept working.  I am still in the middle of the course so I guess after so much time storyline stops recording.  My question is does it stop because Storyline will not record over 2hrs or is it that the computer may just be running out of room on the hard drive.  At the moment I can't tell if it is a hard drive space issue because the course is still going on at the moment.  Most things I use the record screen for is short but some times I might need to get 2+ hours recorded.  Any help would be great.  thanks