How to locate unused PDFs?

Hello.

On a website i offer a couple of PDFs for download. When a file has expired, i remove the link. Then i want to use “remove unused files” in the dropdown, to take this PDF from the list. To be a bit more precise: where in the project is the fu***ng link to this file?

Does not work. I’m very certain that i do not have any link to this file. How can i check where the “blind passenger” is hiding?

Thanks @all. - Mr. F.

Update: I made a new link to this file and removed it immediately. After that I could remove the unused file. Weird, but it worked.

Post removed due to formatting issues