Feeding multiple operations (not bundles) into AI completion for single output

Hi - Newbie here.

I am trying to create a flow which feeds all the text files in a particular Google Drive folder through Google Gemini AI and produces a single output (a podcast script).

My attempts so far have resulted in multiple outputs (one for each file in the Google Drive folder).

I appreciate that I probably need to use Array or Text Array modules, but I cannot see how to get it to work.

All the solutions I have seen so far seem to rely upon having multiple bundles in a single operation. I do not have that. I have a single operation in each of multiple operations (please see image).

Is anyone able to provide an idiot (i.e. me) proof step by step solution?

Many thanks.