Connect iPad and your computer using USB
Make sure you have one of the following:
Mac with a USB port and OS X 10.9 or later
PC with a USB port and Windows 7 or later
Connect iPad to the USB port on your computer using an appropriate cable.
Depending on the type of USB port on your computer, the cable included with your iPad may be appropriate.
A USB-C Charge Cable is included with iPad Pro (11-inch) and iPad Pro (12.9-inch) (3rd generation).
A Lightning to USB Cable is included with other models.
Alternatively, you may need one of the following (sold separately):
A USB-C to Lightning Cable
A USB-C to USB Adapter, a USB-C Digital AV Multiport Adapter, or a USB-C VGA Multiport Adapter