Lastly, the black wire is the ground wire, just like that in any other electrical device (Gnd). The red wire is a positive power wire with 5V of DC power that provides power to the USB device. Both of these wires are involved in data transfer. The >white wire is the positive Data wire. This is the most common type of combination. There are four wires inside a cable: red, white, black, and green. Now that you have understood the function of a USB device, let’s understand what is inside the USB cable. The data is transferred via D+ and D- connectors, and the Vbus and Gnd connectors provide power to the USB device.

There are two power conductors and two twisted signal conductors. The USB has four different pathways to transfer data. One of the significant advantages of using a USB is that there is no need to restart your PC after inserting the device. USB stands for Universal Serial Bus that links the PC to its peripheral devices. Devices like mouse, keyboard, printer all require a USB cable to operate.

Today, almost all the devices connected to the PC are USB-driven.

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