Your Report Folder
By default, your reports are in the reports folder of your ARDI site.
These can normally be found in the /web/sites/ folder of your ARDI installation, under the folder for the individual ARDI application.
For example, on Windows you could find it at C:\Program Files\Optrix\ARDI\Web\Sites\Default\Reports. On Linux, at /opt/ardi/web/sites/default/reports.
Note that your ARDI administrator can move this folder to another location. Reports are sometimes simply found at C:\Reports.