That's right. The filesystem is here.. sort of. The tech is still experimental. It's a completely separate system from the files/albums that we have now.
Here is a guide to help you getting started: https://pixeldrain.com/filesystem
Here are some important things to know:
The filesystem is experimental. Keep backups of all data you upload. I can't guarantee that there are no bugs.
The filesystem is only available to paying customers.
The Pro subscription has a 2 TB storage limit, but it's not currently shown anywhere. I'll add this later. For all other subscriptions the storage limit is shared with the rest of the account.
There is an integration with rclone, but it has not been merged yet. The PR is here: https://github.com/rclone/rclone/pull/7460. I'm personally using this fork to mount pixeldrain as an external drive. It works really well!
FTP is supported. See the filesystem guide for info on how to connect.
It's possible to share directories with other people, it's not possible to allow other people to edit your directories.
If you have any problems with the filesystem, please let me know on the Discord server. The support forum has a filesystem tag for all questions related to the filesystem.