Security Audit Log Profile Parameter

Hello People,

I have been trying to find some information about the System Profile Parameters that are required for Security Audit Logs.

Can someone please explain what the parameter rsau/max_diskspace/per_day means? All that the SAP documentation says is that it is the Maximum size of all security audit files per day

My understanding was that the audit files are stored on the application server itself and only 1 file is generated everyday. How then, is this parameter used?

Regards

Joy