title: Saving excel file with different format without opening it
body: <p>I've build some power pivots that are appending data from couple binary excel files (they have more than 600k rows each). </p>
  
  <p>However I have noticed, that query/pivots that are build on *.xlsb files have terrible performance. The data is refresing 5-10x slower than when collected from the same files but with *.xlsx format. </p>
  
  <p>Currently I'm manually opening these *.xlsb files and saving copy to *.xlsx - query then connects to these *.xlsx files. </p>
  
  <p>I would like to add a macro to my query/pivot report file, that will automatically save copies of the *.xlsb files to save them as *.xlsx, without opening these files prior to saving and after saving. </p>
  
  <p>Is it possible?</p>