How do I identify is a thumb drive is a USB 2 or a USB 3 in Windows if there is no markings on the thumb drive to identify it

I have a thumb drive and it has a black colored USB port. I plug into a computer that only have USB 2 port. At first, it can be identify. I did a format and suddenly, the device cannot be recognized.

May I know how I can tell if the thumb drive is a USB 2 or USB 3, given that it does not have a blue colored USB port and there are no markings or identifier to tell if the thumb drive is a USB 2 or 3.

I also notice that under the Eject thumb drive option, I notice it label as 'USB 3 check!'. This made me wonder if the thumb drive is a USB 3 device.

Please enlighten me.

Thank you.