Hi Bt.Lee,
I am sorry for my later reply.
Yes, you are right, you can't modify the USB ROM bootloader, but you can use the secondary bootloader.
If you use that post code, and want to modify the drive's name.

Wish it helps you!
Have a great day,
Kerry
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------