thx
80gb, and now only 1500mb is available.
it is very peculiar because i cannot locate the (seemingly) large file that creates all this problem.
i have gone into all directories in the windows folder,, and although the volume in the windows folder is shown to be 58gb, when i go into the individual subfolders i cannot locate anything large.
the number of total files is 22180 so it cannot be that a very large number of small files exist making this huge 60gb rogue volume.
i am at a loss