[TYPO3-german] Problem with /fileadmin and google penalties

[Luis E. Suarez]

Hi all,
Apologize for the extensive post an language.
TYPO3 7.6.32. The site contains 4 thousand pages, the content is not 
stored in the database but in /fileadmin. The content is fetched using 
the "fetchurl" plugin. The folders structure has the same hierarchical 
structure as the TYPO3 page tree as: fileadmin/folder1/folder2/file.html 
which is rendered as www.example.com/folder1/folder2/file.html
In all cases the page tree corresponds exactly to the navigation 
structure of the web site.

Since the rendered pages in browsers are duplicated in /fileadmin, I 
protected /fileadmin using robots.txt to avoid indexing by crawlers. 
This worked ok for some 20 years without issues, but now I have received 
an email from Google that reads:

"Top Warnings. ... Some warnings can affect your appearance on Search; 
some might be reclassified as errors in the future. The following 
warnings were found on your site: Indexed blocked by robots.txt. As in 
/fileadmin. We recommend that you fix these issues... blah, blah blah."

The question is what's the best approach to overcome this problem?

I decided to move /fileadmin outside public_html and changing in 
fetchurl fileadmin/folder... by ../fileadmin/folder... But browsers 
can't render images, audio files, videos from outside public_html. Hence 
I must left those files in the public folder. That is I must have two 
/fileadmin in the site. Furthermore, I use Dreamweaver to create and 
upload pages to the server and that application do not understand how to 
place images in public_html while placing content below public_html.

I ran out of ideas, so I like to hear suggestions from anyone using the 
same TYPO3 files structure I'm using.