Add quiz chain

No
Only one quiz will be added to the course

Yes
If the "File name" is a file, it is treated as the start of a chain of Hot Potatoes quizzes and all quizzes in the chain will be added to the course with identical settings.

If the "File name" is a folder, all Hot Potatoes quizzes in the folder will be added to the course as a chain of quizzes with identical settings.