I see what you are saying now, but I don't think it applies to this case.
Based on his description, it's pretty clear that he deleted the top level
000 folder and wiped out his entire file store. For whatever reason,
Windows was lying when it said that the size was 0 bytes.
I'm not sure what will happen if you delete a truly empty sub-folder, as you
describe. However I doubt that it would result in preventing all Vault
files from downloading as described in the original post.
Doug Redmond
Software Engineer, Autodesk Inc.