How to set up secure access to user files and folders?

Question

linux

Good afternoon, forum users.

There are two servers:
1. File server where users' files (audio, pictures, documents) are stored.
2. Web server (based on fastpanel: nginx+php) - a web interface where users log in and log into their personal account.

It is necessary to make it so that each user has access only to his own files (from the first server) and that no one can access the files without authorization.
You also need the ability to play audio files.

Please tell me the correct logic for this circuit.