Ipad Usb Adapter Uses Too Much Power. Unlock the iPad and you should then see a green USB light on the front of your Scarlett. The only way I got it to work is with an USB hub between the lightning-usb adaptercamera connection kit and the interface.
You can normally fix it by supplying more power to the drive or to the Apple device. For example writing to disk requires more power than reading from it. If your iPad wont accept a USB stick because it takes too much power u need an sd card.
Some digital cameras attempt to recharge when connected the extra draw of power causes the iPadiPhone error.
Unlock the iPad and you should then see a green USB light on the front of your Scarlett. Some devices need more power than your iPhone iPad or iPod touch can provide. Several users have reported an issue in which iPads generate the error message Cannot Use Device. Other devices including even some USB flash drives Ive tested prompt the same message but in this case youre pretty much out of luck.