(!) Supplement for Data Recovery:
In another manufacturer of USB flash drive format I've read that there is in such sticks a micro SD card and this will in most cases continue to operate. So I have my Snippy opened with a small screwdriver (The metal bracket is easy aufzubiegen).
And indeed, it is a Class 4 MicroSD card to the fore, which can be pulled out with a bit of tweaking and careful Gebiege the USB stick. This then in an appropriate SD card reader adapter inserted shows full functionality !!!
So it seems to somehow be only at the contacts for Micro-SD card. But the USB flash drive is now broken and no longer use. For the contents of the micro SD card is retained and it is fully operational. After all, a small consolation ...