Secure Files lists folders above files. Choose a folder to open it; the heading above the list shows the path, and each part of it opens that folder. Search covers file and folder names in every folder.
New folder opens a side panel and creates the folder in the folder that is open. A second folder with the same name in the same place is not created.
Uploads and new folders appear in the list without reloading the page. Reloading an unlocked Secure Files tab no longer shows the unlock form briefly.