At the moment (in the web version) one can only drag and drop files from the list of files to a folder in the top bar (My files > folder 1 > Folder 1.1, etc), but I need to be able to drag and drop files directly into folders in the left sidebar.

Another thing important for this feature to work well is to be able to expand the left sidebar, so the entire folder names are displayed.

ps. does this feature exist in the desktop app yet? I'm not using the app yet because my mac is too old...