Is it possible to automate the cleaning of the site from unnecessary files?

Question

Automation

Hello! There is a site with a very large number of photos. Most of them are unnecessary and just take up space. Is there any way to automate cleaning?
For example, some program finds all the paths of images and files and looks for them in folders, etc., and simply deletes all the rest.

Answer 1

Of course you can.
Such a simple script can be written very quickly.
It will take more time to figure out how to run it.
(meaning to understand the author of the question, judging by the question)

Answer 2

It is possible if you have a list of unnecessary files.
If you had specified the programming language, I would have written the code to remove unnecessary files.