I am trying to get the fraud procedure.

As I get it the machines flip the votes and told the employees how many "Biden" ballots must be produced and storaged for the recounts. (Hence the USB's going around)

Because Trump got so many votes they had to insert extra ballots, so many so that they had to stop the entire operation.

So in order to win they had to create a constant stream of "Biden" ballots to adjust the count, while taking out Trump ballots AND on top of that they had to insert 100.000+ extra ballots in batches to secure the win.

Is this assumption correct?