In the new My Files app the folders which I have marked as favorites (starred) aren't visible anywhere. They used to show on the home screen. I can see that they are in fact starred in the folder list.
Thanks, that may be as good as it gets now... but previously there was a panel below the drives list where the starred files and folders were shown. And in the Galaxy store app description it says "Folder and file shortcuts: Show on the device home screen and in the My Files main screen", but it seems now the second option is gone.