If I try to use Gparted on a USB drive, I keep getting errors saying that the drive contains a mounted filesystem. I can unmount it in Gparted but then the drive is automatically re-mounted by (I think) KDE. If I use KDE's device menu to eject the drive manually and then use Gparted, I still get mounted filesystem errors. Any thoughts? Thanks
Figure out what is automounting your stuffs and stop it.