[X4U] Free disk space percentage

[Eddie Hargreaves]

In the continuing saga of 'how much free space do you need' ...

Rob Griffiths, of MacOSXHints.com writes:
"Keeping at least 10% of your drive space free is advice that I've followed
for quite a few years; I don't know if that figure is too high or too low,
but I've never run into any drive-space-related issues using it as a
benchmark."
http://www.macosxhints.com/article.php?story=20050714154930216&lsrc=osxh