Hey Leo Han,
Thanks for posting and welcome to the Bose Community! I'd love to assist you with this issue you are having with your QC30's.
Can you please let us know a little more about the issue you are having? If you are having issues with the btu site please attach screenshots to this thread!
We look forward to hearing back from you with further information.
Hi my friend.
When i tried to use BTU to update my firmware for my QC30, the page always show not work and two choices, retry or restart the launcher.
I am not sure whether this is caused by the server
I am sorry to hear this.
Can you connect your headphones to the Bose Connect app?
It is possible to update the firmware through this application. You can find instructions here.
Let us know how you get on.