I use drag & drop a lot, but some things simple doesn't work.
Drag and drop works between panes in Commander One itself and between Commander One and Finder in both directions.
It is possible to drag files from Commander One and to drop them in Outlook, but it is not possible to drag attachments from Outlook and to drop them in some folder in Commander One. As a workaround I need to open that folder with Cmd+Alt+O.
It is not possible to drag pictures from webpage to some folder in Commander One, so I need to use same workaround. I tried Chrome, Brave and Safari with same results.
Please add this to your users "wish list" and at least think about it.