Hi @kongondo,
First of all thank you for the welcome message and for taking the time to answer me! :)
Then and indeed, I probably lacked clarity and it may be questioning around a non-problem.
We fully agree on the principle that these are public content, by confidentiality I mean that each entity should be considered as not hosting another compared to the file tree.
To further illustrate my previous post, let's say that for example I have two separate sites on the same PW installation.
A site for artists and a site for cars with respectively a "site-artists" and a "site-cars" folders.
I don't really understand the logic of making it possible to access the resources of one site or another by simply modifying the url. It seems to me that this does not happen in a Wordpress multisite network environment (but maybe I'm wrong) and that the cars site should not have access to the artists site, and vice versa. cars.com/site-artists/images/david-bowie.jpg artists.com/site-cars/images/volkswagen.jpg
That said, after performing some initial tests with the "Httrack" site vacuum tool, nothing was recovered outside the domains concerned, even the main domain did not manage to recover the contents of the hosted sites, I imagine that this is linked to the fact that no resources clearly point to the other entities.
So far so good! Thank you again for your help and your attention. :)