Current situation:
Currently, it's only possible to upload files (or linked files) via BIM360 web UI. To upload folders (including files), users need to use Autodesk Desktop Connector.
When user tries to upload a folder, the progress bar indicates "initializing" and icon remains looping.

In Autodesk Build, this is handled differently, and the user gets a message:

Idea:
Since not all users use Desktop Connector (only available to specific user group, like key users), it would be beneficial if BIM360 would support upload of folders via web UI. If that's not planned, it would be good if user gets a notification - similar as in Autodesk Build.
Otherwise it may lead to confusion.