Where are the PDF files generated by the standard Bitrix document generator located?

Question

1C-Bitrix

Is it possible to give access to the folder with these files as a Network drive and set the rights to download and upload files back to Bitrix?
Why is it needed: We want to sign the created files with an electronic signature. To do this, there is a program on the server that takes a file in folder A, signs it and sends it to folder B. I want to replace these folders with a Bitrix Network Drive with ready-made PDF files.
I was able to find these PDF files here: Space Cleanup - Disk CRM Documents - <Files at the root>
site/company/personal/user/user_id/disk/volume/storage/three-digit_number/three-digit_number/

The files themselves with the ID are available in the company card: Documents - List of documents

Update: I was able to connect "Disk: CRM Documents" - created a new storage and changed the ID in "STORAGE_ID" => "
I see all the created files, I can download them, re-upload them back, if the name is not changed, the file will be replaced.
But what it's meant to do doesn't work. The replacement of the created file in the card of the company or deal where it was created does not occur. It's a pity.

Answer 1

Is it possible to give access to the folder with these files as a Network drive and set the rights to download and upload files back to Bitrix?

No, because only logical drives of users and/or other entities can be mapped.
You will never get physical paths.