Look for anything ending with a TMP file extension or anything that starts with a dollar sign ($). You want to get rid of these they are intended to be temporary, after all. First, get out of Word and do a search (using Windows tools) to locate any temporary files that may be created by Word or by other programs. There are a few things you should try to help narrow down the problem. He's tried chopping it up into smaller files and saving those, but whatever he does he gets the same error response.
If David tries to save it without altering it, there is no error response, but it also appears that the document isn't really saved anew (insofar as its Date Modified property isn't updated). If he tries to edit it and save it, he always gets the reply that 'The disk is too full or too many files are open.' Neither situation is true. David has a large Word file, approximately 6.3 MB in size.
