Hope you are doing well, thanks for posting your query.
Hope this information helps : https://www.programmersought.com/article/90883716622/
Please let me know how it goes.
Quartus only uses these files during device installation. You download them from the download center and point to them when you want to install a device family. It doesn't store them anywhere.
Since this thread had been answered, we shall close this thread. If you still need further assistance, you are welcome to post a response within 15days or open a new thread, some one will be right with you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you with your follow-up questions.