Files from website's directory not displyed in google search results

Question

I know the website(say xyz.com)
which have some .zip files (say xyz.com/y0.zip) but they haven't specified on website they just uploaded it(saved in their storage). I know some file's name (here y0.zip or y1.zip)
and I don't know some file's name(say n.zip)

after long googling i.e. searching filetype:zip site:xyz.com and also "www.xyz.com/y0.zip"

still I AM NOT GETTING ANY RESULT from google search

I want list of zip files in google results so that I will be able to download unknown files (here n.zip)

Is there any operators in google search or any other ways to achieve it..

Thank you

Answer 1

Google and other search engines index files by exploring all the web pages in the website.

the exploring usually starts from the main (index) page, and spread to other webpages that is reachable (i.e. linked) from this page, the same operation is done to all discovered pages.

so if there is no links in webpages(on the same website or any other one) that is linking to the .zip files you are asking about, search engine will not be able to discover those files.

also some websites have robots.txt file that contains a list of directories, to tell the search engine that is exploring the site, to do NOT explore those directories and any sub ones or files, such directories contains administration and private content.