Hi and welcome to the forum.
There are several ways of answering your query depending on your confidence. For the simplest but slowest see the refernces to Elinker or Media Controller on these wiki pages (link) files available from here (link),
If you are feeling more adventurous then you can modify the 9200t following the instructions here (link) NB please ignore any reference to hummy.org.uk as this no longer exists. (This information is due to be moved to this site.) Files available from the same link above.
Bear in mind that any alteration is entirely at your own risk.
You cannot transfer directly to an external hard drive but only through a PC.