I apparently made a mistake when I was exploring what were the strange things in the lower right corner of my screen... It appears I have dismounted the internal microSD card (I thought these icons were related to the microSD card slot, which is currently empty on my Adam).
If I look in Sniffer, I now have nothing in the memory. Anyway, what should I do? Any help would be greatly appreciated.
Problem solved: folliwing two advices I got I turned the Adam off. When I turned it on again it was back to normal.