Windchill 11.0 - Where are Risk and Reliability backups stored?

I am using Windchill Risk and Reliability Enterprise Edition (Formerly Relex) Release 11.1 and Datecode with CPS02 to perform Mean Time Before Failure (MTBF) calculations on circuit board assemblies.  We run the Enterprise Edition on a server. We no longer have a dedicated IT application person on staff so we've lost our application expertise.

The issue I'm having is with a project backup. I'm able to select the project I want to backup, go through the backup steps and get the message that the backup completed successfully. But, we can't find the backup file. It's not stored locally on my PC and our IT person wasn't able to locate it on the server.

Where would the backup file would be saved?  Filename?  File extension?

Thanks in advance