The problem is down to a bad entry in the master filesystem table
or
/etc/fstab
Go to a terminal and type
sudo gedit /etc/fstab
Find the line that refers to your thumbdrive ; it will be /dev/sdXN (where X is a letter and N is a number), where the filesystem has been set to one of the CDROM filesystems (cdfs, isofs, etc). It won't be one of the lines that has a big UUID in it. On a fresh install, it's usually the last line.
Delete this line, save, reboot (may be unnecessary). You should now be able to connect your thumbdrive and have it show up on the desktop.
Note ; be very careful about what you edit in /etc/fstab as it can render your machine unbootable.
The problem is down to a bad entry in the master filesystem table
or
/etc/fstab
Go to a terminal and type
sudo gedit /etc/fstab
Find the line that refers to your thumbdrive ; it will be /dev/sdXN (where X is a letter and N is a number), where the filesystem has been set to one of the CDROM filesystems (cdfs, isofs, etc). It won't be one of the lines that has a big UUID in it. On a fresh install, it's usually the last line.
Delete this line, save, reboot (may be unnecessary). You should now be able to connect your thumbdrive and have it show up on the desktop.
Note ; be very careful about what you edit in /etc/fstab as it can render your machine unbootable.