Location of KM files on Server

Does anyone know where KM files are stored on the Portal Server?  And are they saved with the name I give them in KM in the portal, or does the system give them a new name?

I am trying to write a batch file that copies some KM files every day and moves them to a different location on the server, but I can't find where on the server the KM files are stored.

Any help would be appreciated.

Thanks,

Owen