Creating link to a file from html page when file name is not fixed

Question

I am trying to create a link to file from html page but the problem is the file name is not gonna be same every time. For example the file name could be Filename_11.txt, Filename_12.txt, Filename_xx.txt etc. I have tried using * with the file name but it did not work.

<a href="FileDirectory/Filename_*.txt">Click to open file</a>