Place a floppy or CD in the respective drive and double click on the appropriate floppy or CDROM icon on your desktop. The Thunar file manager should pop up in a few seconds showing your files on those media.
Did you do the above?
For some unknown reason this method doesn't work with my floppy
I mean, floppy mounts but no file manager is launched to view contents of disk.
I have to go to /mnt/floppy to see what's on floppy drive.