INteresting....is the HD on the PC partitioned and you are trying to save it to a smaller than needed partition?
Are you saving it to a file and the file size is limited?
If not, maybe you should try saving it to a file. "Back-up tablet" Or...could it be that you are also attempting to back up the OS and the PC isnīt having it? Try all the files, without the OS.....
If none of that works.....I have run out of ideas...
j