Comment 35 for bug 453072

Right now, i think "unmount" is the best option, Kamereon has true:

>The only way I know to really free this space on an external drive is to use 'unmount'. On 'unmount' Nautilus will ask me if i want to delete the trash. 'safely remove' and 'eject' will not do that.
So I think that even the most non-technical users will need 'unmount' if they ever want to free some space on their drive.
A better solution would of course be, if 'safely remove' and 'eject' would be merged to one command and that that command would also clear the trash.<

And there is bug related:
https://bugs.launchpad.net/ubuntu/+source/gnome-applets/+bug/569724