Less than a week after an iFixit teardown for the iPad Pro revealed a USB 3.0 controller, Apple has confirmed that the tablet's Lightning port is compatible with the new USB standard, something which the company didn't advertise initially. This means that the iPad Pro will support transfer speeds of up to 5Gbps, which is more than 10 times faster than the USB 2.0's theoretical maximum of 480Mbps. However, keep in mind that the cable the tablet ships with is a standard USB 2.0 one, which means you'll have to purchase a separate USB 3.0 adapter to take advantage of the feature - sadly, such an adapter doesn't exist...
Source: http://www.gsmarena.com/ipad_pro_features_a_usb_30compatible_lightning_port_apple_confirms-news-15010.php
