@ loselchuah, the advice given by archos is out of date. The earliest firmware (probably accidentally) allowed the 3G usb port to be used for other things, and a later revision blocked this flexibility. There was a lot of protest, and the capability was restored in the following release. I suspect Archos were putting the restriction in place for three reasons:
1. They do not want to have to test a wide variety of devices in that port;
2. The socket has not been tested - and might not be properly engineered- for frequent inserts and removals; and,
3. certain usb devices could put a strain on the socket, and on the back of the screen.
re the last point, a short usb extension lead can help here.
So, Archos are allowing us to plug other devices in the 3G port, but not encouraging it; it is at our own risk, and there is no guarantee that your device will work. Ideally, of course, Archos would provide us with a way of dual-booting Linux, and then we would be able to experiment with our own drivers...
G9 80 8GB 1.0GHz, firmware 4.0.28