I have two Excel files with the same headers. I want to import all the data from one file into the other but I don't want the header from the second file. Both files are huge, each has over 100K rows. I created two test files to experiment with and I almost have them doing what I want but not quite. I can import the second file into the first but I get the headers from the second file as a row in the first and when I click on that row to delete it, it won't let me (see first picture below). I'm currently using:
Data>Get Data>From File>From Workbook
That gives me a file browser, I navigate to the file to import and select Import. I then select Sheet1 and at the bottom click on the drop down menu on Load and select Load to. That gives me an Import Data dialog (see second picture, note: ignore the cell number below the existing worksheet, that was just an effect of when I did the screen snapshot, when I do the import I have the cursor positioned in the first column and row after the current data, i.e., after Case 4 in row 6 column A).
I select Table and Existing worksheet. I've tried both checking "Add this data to the Data Model" and unchecking it and in both cases it still adds the header as a row that I can't get rid of. All I want to do is to add all the rows as new rows at the end of the first worksheet (see the third picture for an example of the desired outcome). I can get it this way with my toy example by just copy pasting but there is too much data in the real files to make that a desirable option.

