Here is a structured essay on the subject.

A user finds a Kingston DataTraveler that is "Write Protected" or showing as "Generic Boot ROM" with 0MB capacity. Standard Windows formatting fails, and "low-level" formatters don't even see the drive. : The user fires up ChipGenius

(proceed with caution):

To download the firmware update tool, visit the Phison website or a reputable download site. Make sure to download the correct version of the tool that corresponds to your USB drive's controller chip.