Power Query - How to Append New Records on Refresh?

[Manuel_Spreadsheet]

Hi all -

I'm setting up a workbook with a few Power Queries to pull in external data. One piece of data is a weekly time sheet for all employees. At the each week, I get a new file with that week's hours worked. I'd like to load those records into the existing table that I have setup in my workbook (retaining all past week's data, and also ensuring no duplicates, if I refresh it more than once).

Any guidance on how to do this would be greatly appreciated.

Thanks!