How can I tell if the USB flash drive I bought is USB 3.0? Can you tell the difference from the shape?

1. Insert this USB flash drive into a USB 2.0 socket. If it is a 3.0 flash drive, the system will display a prompt message as shown below.

2, from the appearance of the USB3.0 socket is the internal nine metal contacts, four below, five above, the following figure is the USB3.0 USB flash drive plug style, for reference.