What is the difference between USB 2 and 3 ports?
Backward Compatibility -- USB 3.0 ports are also totally backward compatible, which means they will work with other USB versions, including 2.0. This means that when you plug a USB 2.0 drive into a 3.0 port, it will work. However, if you plug a USB 3.0 drive into a USB 2.0 port, it will be limited to the max speed of USB 2.0.
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