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The filename in your File Writer is a static string; click on the equal sign to enable it as an expression (i.e. it will appear darkened). This will allow the file to be written to a temporary directory (since you are using pipe.tmpDir) on the snapex execution node and prove that the Excel Formatter is able to handle the data volume. Please review the File Writer snap documentation to gain an understanding on how you could write to an alternate endpoint that you can safely store the file over 100MB.
Hope this helps!