Automate activity report download BUT the pattern?

Summary:

Download of Activity report works but however as part of automation would like to know how does the pattern change or is there any criteria at all to identify?

Content (please ensure you mask any confidential information)

Download of Activity report works but however as part of automation would like to know the pattern change or is there any criteria to identify?

Example:

apr/2024-10-17 04_42_49/2024-10-17 04_42_49.html & apr/2024-10-16 04_42_42/2024-10-16 04_42_42.html, are 2 html files and how does this highlighted pattern take effect/change? Without list files unable to arrive at the complete File path and File name