Thanks for your response David.
I am editing in Pal.
My Capture Settings-scratch disks are set to my Lacie external hard drive….all four of them are ticked in one line (Video capture, audio capture, video render & audio render ….though the tick under audio capture is grey). Is that wrong?
And minimum allowable free space on scratch disks, as i was advised, is set to 5000MB
I have not compressed the video.
What should I do to stop the stopping?!
Thanks, Anna