Nextcloud
We use Nextcloud to share files across the company. You can access it with any web browser by following this link.
The main Nextcloud folder can also be opened on GNOME (as a server on "other location") and as a share on Mac and Windows using the following URL:
davs://files.vshn.net/remote.php/webdav/
You can also sync folders to your laptop for offline access using the official clients.