?Which is faster USB 2 or USB 3
The speed of data transfer in the second version USB2 up to 480 Mb per second while the speed of data transfer in the second version USB3 up to 5Gb per second ten times the speed of USB2, this is a natural progression that the latest is the fastest, therefore you must choose a desktop, or laptop supports a second version, fraek device does not support the second version is considered a flaw and weakness in the device .
The power supply and
Of course to him the power supply and the appliance connected to the outlet more efficiently and save energy in the second version USB3, you can charge your mobile phone or devices you other more quickly, with a feature on some devices to port "USB" remains effective and increases your devices connected to it powered without the need to keep equipped device like a laptop or desktop computer in the operating mode, when closing the computer provider keep at least one of the USB3 ports effectively evens out the power supply, This feature is useful in traveling, you can charge your mobile phone from your laptop without having to run the last and extravagant in energy to charge your mobile phone unlike USB2.
?How to tell the difference between USB3 and USB2
You can find out if the issuing USB3 is present on your desktop, laptop or mobile , it's very easy to be distinguish USB3 colored blue if the color of the USB port you have blue trust completely it's USB3 and illustration in the following image :
Of course you can also find out by the management of the devices in your computer , but the color theme you mentioned already the fastest and simplest route