On Thu, 29 Jan 2015 10:02:33 -0500, Paul wrote:

(PeteCresswell) wrote:
Per . . .winston:
So no single update was 30GB as previously implied

Correctamundo!.... must have been from something else, although I still
cannot figure out what. To me, 30 gigs is a lot of space and it seems
like I should have been able to find it in WinDirStat unless it was just
a gig here and a gig there across many non-windows directories.

WinDirStat cannot look inside System Volume Information.

If you just want to look around in SVI to see filenames and their sizes,
then TreeSize Free works a treat. You can open most of the files, as well,
but I see no reason to mess around in there.