Thanks for the assist. I agree, anything to i-devices is a pain. I settled on using drive and sharing the link Google makes it available cross device.
And yes I know about YT, but the video is required to stay private until after judging.
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Adoptable storage is built into the OS. It's integrating the sdcard in a way that does not exist in Lollipop. The closest is to Move to SD.
If you know what your doing, and the device is rooted, you might be able to edit vold.fstab and create an internal mount point, basically swapping internal storage with external storage.