We are looking for a service to be developed that shows a user's files - similar to this WordPress plugin:
For this POC we don't mind if the implementation is for Google Drive/OneDrive/Box etc, one is sufficient
The actual file viewer is a necessary part of it.
It should be a standalone application and not for WordPress.
Ideally in (preferably) PHP 7 or Node.js - MongoDB or MariaDB/MySQL. It must be viewable through an iFrame.