I install knoppix 4.02 on my HDD and i plug in my usbflash memory
then i go to konsole and write : mount /dev/sda1 /mnt/usbflash (where usbflash is previosly maked directory from me)
and i can read everything from my flash drive using GUI
but in GUI I logon with user account and I can't write on usbflash memory using GUI

can you help me

what do I have to do so I can write files on my flash using GUI