That the next question is only displayed, if a file was uploaded?
In this case it is always the best to activate the survey, enter some data and have a look at the responses.
Here you see how you can address the needed variables.
You will see that
in QCode the filename is stored
in QCode_filecount the number of uploaded files is stored.
So you may use one of them, either e.g. "!is_empty(QCode)" or "QCode_filecount>0".
It's up to you.
Joffm
Volunteers are not paid.
Not because they are worthless, but because they are priceless