Hello everyone, I'm currently going through the task 05 of the eudalypta challenge. I thought my implementation didn't work, so I tried testing a a person's solution on github <https://github.com/agelastic/eudyptula/tree/master/task5>. However, I am still unable to manually bind the USB device to my driver. Here are the steps I did. 1) Use* lsusb -t *to find the bus and port USB device was connected on. It was *1-3*. 2) Went to *sys/bus/usb/devices* and found that *1-3 *was bound to *drivers/usb* using *tree*. 3) Used *echo 1-3 > unbind* to unbind it. 4) Went to *devices* folder and checked if it was still bound. It was not. 5) Went to the directory of my own driver, named *hello_driver*. 6) Tried to do *echo 1-3 > bind* but got the error message *echo: write error: No such device*. These instructions are based on LWN.net Manual driver binding and unbinding <https://lwn.net/Articles/143397/>. One suspicion I have is that this simple USB driver doesn't support the USB device I am plugging in (a USB flash drive). I actually have no idea. Many thanks for your help.