I have a view that shows values that have blank values. I want to download ONLY that list. How can

[Tiger1]

I have a view that shows my table.  The table has a reference to another table.  When I show the view I group by [Account] column first.  When I do so it shows us we have 777 that are not put in any account:

This part is fine.  This is what we want to see.  We now know 777 items do not have an [Account] value. 

However,

   When I go to download ONLY those 777 - i get the entire table.

Why?