RE: [support] Why doesn't Drupal sees the "files" folder?

AjK wrote:

...

Is there really no way to have separate files folders, one for each virtual site?

I set the files folder in the settings.php file thus:-

$conf = array( 'file_directory_path' => 'files/www.example.com' ); so it can't be changed by a site admin

Thanks. Can it be changed to be inside the "sites" subfolder: 'file_directory_path' => 'sites/www.example.com/files'

this looks cleaner to me, since it would make per-site independent backups and, maybe, future migration of each site to a separate server easier. What do you think? Is it possible to set it as I propose? Is it a good idea?

TIA, D. say, future