The easiest way to mount aditional storage devices is to launch kdf or kinfocenter . KDiskFree is a portion of information that is found in the kinfocenter under Menu -> System ->Kinfocenter Find your USB storage device in kdf and it will show you the device, file type, mount point, and available free space. You can right click on the listing to mount it. I'm surprised you have 4 desktop icons for a single USB memory stick. At least with kdf you should be able to determine the file type. Mine is vfat.