That indicates a short circuit or power surge. Do not connect that device again. Test the USB port with a known-good device. The MT6261's internal PMU (Power Management Unit) may be fried.
, including its functions, installation methods, and troubleshooting tips. Understanding the MT6261 Chipset mt6261 usb driver
: Allowing the device's internal/external memory to appear as a drive. Community Projects For practical implementation, the OsmocomBB project That indicates a short circuit or power surge