CubeMX removes HAL drivers when USB middleware enabled
BTW, I tried to manually work around this issue by opening the project in TrueSTUDIO and dragging/dropping the HAL driver folder from Windows Explorer into the Drivers folder in the project. But I get an error saying "The resource 'STM32F4_HAL_Driver does not exist on the file system", even though I can see it in Explorer and open the source files.