Transport method to select to append a dataflow output to a dataset?

Hi, 

I have a couple of files running daily that I want to combine into one file using a Domo dataflow in order to append to an existing dataset I have on Domo. I was wondering what "Transport Method" I have to select when I set up the workbench job in order to select a Domo dataflow output as the file I want to append.

Thanks in advance!