Comment # 7 on bug 964361 from Wolfgang Bauer

(In reply to Armin Mohring from comment #6)
> I want a cake from you...

You won't get one. ;-)

> If you want to check the free and used space on a USB Stick, then you have
> to navigate to the mount point.
> But that makes no sense.

Again, I don't understand you.
Please answer my questions.

What exactly are you expecting here that doesn't work?

Yes, you have to open the USB stick to get the information you request, but it
should work.
That's upstream behavior.
If you want that changed, please ask at KDE (http://bugs.kde.org/)