Tech Support Question - Vista

[Kevy Baby]

There are a lot of people much smarter than I that may have an explanation for this oddity.

We are a small office (6 people). In lieu of a dedicated server, we use the Shared Documents folder on my computer as the server (it is a new Dual Core HP running Vista). The people who set this computer up for us set things up so that when I look at "My Computer", the Shared Documentsfolder shows up as a drive. Specifically, it is called the "S" drive (S = Shared). However, this is a mirror of what is in the Shared Documents folder ( a detail I confirmed a few minutes ago).

Here is the dilemma: when I get the properties of the "S" drive, it shows that there is 95.4 GB being used out of the 135 GB available. However, if I go to the C drive and get properties on the Shared Documents folder, it says that the folder is 38.4 GB.

When I look at the individual folders located in Shared Documents and secure their sizes, they definitely coincide with the 38.4 GB total.

Any idea why this discrepancy?

ETA: in case it makes a difference, the drive uses NTFS file system.