URL Invalidation Time

Hi Expert

We want to publish the URL of the PDF file uploaded to the file storage for only one week, and then keep the file private.

We know that deleting files within 72 hours can render the URL invalid.

Does it take 72 hours for the standard to delete and hide files?　Or may it take up to 72 hours at the most?

If it takes up to 72 hours at the most, when should we make the deletion action？

We want to publish the PDF file for only one week, and then keep the file private immediately.

Do you have any good suggestions？