Find/Select File whose file name changes - A360

Hello, 

I want my bot to find a file on my local machine whose file name is dynamic. The file name has a timestamp, hence why the file name changes.

How can I tell my bot to find that file whose name changes? I need this file uploaded on our website from our local machine. 

Please if someone can walk me through and show the entire process, that would be very nice!

Thank you!