What you see below is two directories. The first, on the left, is the the original directory I was zipping up with 7-zip. It is reported as 4.26GB. On the right, we have how large the zip file came out to be after zipping it.
Why is there such a disparity between the two? There's a big difference between 4.26 GB and 91 GB …
Best Answer
You probably got the picture on the left with lower privileges (non-Admin), while archived with Admin privileges.
Other, less likely explanations include:
Users
were changed between the time left and right pictures were takenUsers
may have an item linked/bound to some external storage location (some directory outside theUsers
, or maybe even WebDAV location), which was not available when the left picture was taken.