Hi @WilliamStevenso ...
So yeah...according to this Guide, How do I restrict files and folders to students in Canvas?, it states the following:
The default restriction option is to make the file only available to students with the link. The Only available with link radio button [1] makes the file available to students who are given a link to the file. The file will be hidden from students in Course Files.
You can just create a new page and then assign it to that one student. Then, in the body of the page, place a link to the file for that student. Your student will be able to view/download the file, and none of your other students would be able to access it because of the permission setup you used.
I do understand why you'd want to keep your "Files" page visible to your students...because some instructors like to have folders organized there that mirror modules/chapters/weeks in a course. (You may be doing something similar.) But other instructors also hide "Files" from their courses and then link to those files from within other content pages in their course.
Hope this helps a bit. Keep us posted if you have additional questions.