PW Extraction Temp Directory

I apologize if this questioned has been asked before, I did a search for ProjectWise Extraction and could not find the answer so here it goes.

Is there a reason why the directory ExtractionTempDir on our ProjectWise server is filling up and not being automatically deleted?  The directory is close to 190 GB and I thought this is just a temporary location used for the extraction process.

If it can be deleted that is great, but I think this has happened before and if there is a setting I missed I would sure like to know.  I know disk space is cheap but....

 TIA

Sean Keene

ProjectWise V8i