Michael, use the link to the thread to reply. That way others in the forum can give advice as well.
> The drive is a bit full (340 out of 400 gigs)
That is getting close to the danger point but not quite there. However, the 2GB file-size upper limit means your drive is either formatted for PCs or Mac OS Standard. Any file larger than 2GB gets split up into one master file and however many reference files necessary to store all the data. Click on the drive's icon in Finder and press APPLE-I to look at its formatting -- it's probably PC-Macintosh Exchange. You probably need to wipe the media off, reformat the drive in Mac OS Extended (Not Journaled), and recapture.