This might be a question for Microsoft, but maybe someone here has a clue:
On any Windows versions I've seen, USB sticks can be ejected easily by right clicking on the drive's icon and choosing "Eject", but external USB hard drives cannot be ejected like that, because the "Eject" command doesn't show up when you right click on a USB hard drive's icon.
Is there any rational reason for this?
The only way to eject external nUSB hard drives is via the tray: