Space Usage Reports is an optional feature and can be enabled to show up in Confluence Administration. Feel free to override the default template with your custom report. For the default Custom Space Usage Reports the Reporting Plugin and Viewtracker Supplier is required!
Please note that we don't give support for own configured Space Usage Reports.
After this kind of report is enabled a new tab is accessible in the Confluence Administration where the report can be defined:
Access the custom space report
The report can be accessed in the Space Administration, next to the Builtin Reporting Tab.