How do I move or copy files from /storage/emulated/0?
Well, after much testing, found the destination MicroSD card had file structure corruption, causing the problem. It was resolved by mounting the MicroSD card on a PC, copying all the good files to a desktop folder, running gparted to unmount and reformat the MicroSD card, and copy the files back once the formatting completed.

Rooting was not required to access /storage/emulated/0 .