A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
There is a better way:
Copy one of your Store files and name the copy e.g. "Data.xlsx"
Make a new file and use Power Query to pull the data from that file, create your Pivot table and other analysis as usual. that is your Analysis file.
If you want to analyze a different Store: Copy the Store file, name it Data.xlsx and overwrite the old Data.xlsx file.
In your Analysis file click Data \ Refresh All, done.
And if you have a lot of Store files in the same folder, you can pull all data from all files using Power Query into your Analysis file and create e.g. slicers to filter the Stores you want to compare, use Timelines etc.
Andreas.
Power Query #08: Import Multiple Excel Sheets From Multiple Excel Workbooks - YouTube