Create a lite intra

I have a small input project with file storage, and I'm wondering if Dropfiles can handle the job. Let me explain the situation. It's an agency that works with works councils (CE) of companies.

The agency wants to create folders with access to deposit files so that user accounts can access them. This part is easy:

Create a group.
Create a user in the group.
Create a folder and set permissions.
Sending notifications only to the CE manager seems possible with owner management (am I wrong?).

However, they would like CE members to be able to deposit personal documents such as IDs, which should only be visible to the person who uploaded them. Is this possible? Is there ACL management like "see only the files deposited by the user"? If not, can you suggest another way to do this with Dropfiles?

Last question: Is there a simple API for creating a folder with automated settings, for example? We have a developer, and I'm wondering if there's something available.

Thanks in advance, hoping for good news!