In case anyone else ends up here or anyone is still following this:
1) it may help to pull the stick out and back in, I have had this help many
times
2) some other programs mess up the partion and or format of the stick, so you
can use the USB Formatter first to fix it. I format to fat and
I had the same problem tried to remove the one and panel crashed and restarted
the battery icon was gone so I thought it was removed so then I tried to put it
back
then I ended up with 2 and niether had an icon just a small empty space that
you could click on and get the settings menu
I went to
