I am running the iPadOS public beta on my first Gen IPad Pro 12.9. If I purchase the lightning to USB3 camera adapter will I be able to read and write to the USB drives using the files app? The drives I have are small and powered by USB only. I have seen plenty of references to people accessing drives with the USB-C connector and the latest iPad pros but not on the previous generations. I just want to make sure this is possible before I buy the thing. Thanks!