Hi Johnny3,

KNOPPIX by default makes devices read only. It
is part of the philosopy of a demonstation project
to not harm a system, unless the user enables
something.

I suspect you need to right click on the desktop
icon --> propertiex -->device --> and uncheck
the read only box.

Some usb pen drives may need to be partitioned
and formated -- but most should work as they are.

Best Wishes
paradocs