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Make sure you have the files vApp app on your iPad (all iOS v 11 and above come with this App as part of the install, for more information read this Apple article: https://support.apple.com/en-us/ht206481)
1.Download the one drive One Drive app from the App Store here: https://itunes.apple.com/us/app/microsoft-onedrive/id477537958?mt=8
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2. Sign into the One Drive app with your One Drive credentials and make sure it appears in your files App as well.
3. In the files App you'll need to "switch on" your One Drive by tapping Edit on the top of the page sliding the toggle next to One Drive to the right (it will appear green when it's activated).
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4. Now when you login to TouchCast Studio, under vApps, tap "Files" to access your One Drive or Cloud Service.
You can upload all your content via a cloud service and import as a vApp into TouchCast Studio with this method.