Alright, that makes sense; first hover over the target tab to activate it, then move down and drop the file into the *folder window* of* the target tab (not try to drop onto the tab itself). TNX for super-fast clarification!
I find those mouseover tabs previews of the window contents a bit small and less helpful, esp when looking thru Explorer tabs, they all look about the same (like any folder filled with files and subfolders). Suggestion to show *full* windows title (full Explorer path; full file name) on mouseover in tab title. Thanks!
Per newsletter annoucement, Groupy facilitates to " Copy files between Explorer tabs by hovering over the target tab" Doesn't work for me; hovering over some other grouped Explorer tabs gives me the "forbidden entry" sign Windows 10, Creator's update. Any ideas? Thank you!