Hey there, geekIN.
Have you tried reformatting it to see if you if it pops-up properly afterwards? Click with the right mouse button and select "format" and follow the steps. If that doesn't help perhaps you could try doing that with a different computer to see if the same thing happens. Another option would be to try the flash drive manufacturer's formatting tool, to see if this helps.
Please let me know how it goes.
Boogieman_WD