Power BI Template for Excel files using file location as a parameter

Hi, 

I am doing periodical reports right now on excel file extracted from a Database and other sources. I need to have a template to be used every month, qurder or year with a reference to new excel file. I have those files stored on a shared drive.

my question, how to make the excel file location as a parmeter, so every time I open a template, it asks me about file locations?

Thanks.