hi steve and paul,
you might find that it is down to the read/write speed of the stick as well as
the capacity.
i got a portable hard drive for someone a couple of years ago who wanted to
record from their tv and when i checked in to it it turned out you needed high
read and write speeds for it to work propperly.
from memory it needed at least 10 write speed.
i tried it on my LG tv before sending it to them and it worked fine without an
external power supply using just the power supplied by the usb socket.
again from memory it was either a 60 or 80gb drive, so the capacity could be
relevant depending on your tv model.
pete.