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So, usb 2.0 vs 3.0? Internally, USB 2 has 4 wires where USB 3 has 9 wires. USB 3 is generally colored Blue on inside to distinguish it from USB 2.

USB 3 cable can be of a maximum 3 meters long. So, it is possible to power more devices from one hub.

The USB connector has many sizes and shapes. Version of USB USB 1.x Data transfer rate of 12 Mbps, supports up to 127 peripheral devices USB 2.0 Is Known as a hi-speed USB, supports USB 1 devices and cables, was first introduced in 2000 USB 3.0 Is Known as SuperSpeed USB, an improved version of USB-2, first introduced in 2008 USB 3.1 Known as SuperSpeed+, is the latest version of USB having the fastest data transfer rate, was first introduced in 2014 USB Type-C USB C connector is a reversible plug which is a double-sided connector having 24 pins, was introduced around the time of USB 3.1 Variations of USB Connector USB Connector Types It is generally known as a USB flash drive and its functionality is to store data like a hard drive. When you connect a pen drive or camera or smartphone through a cable to your PC, the cable is known as a USB cable and the port you are using to connect to your PC is the USB port.
