If I understand your reply correctly, it doesn't address what I'm trying to do. I don't have multiple apps trying to share a file.

On my previous phone, some of my apps created/read/updated app-specific files. Those files were located in "Internal Storage" (not in any subfolder of Internal Storage). As a result, those files were accessible from both my phone's file manager and my PC's file manager (when connected to my phone) if I needed to copy/delete/edit them from outside my apps.

It's my understanding that, when I move my apps to the new phone, the apps (which still need to use the info in those files) can only access files that are in "/data/user/0/myApp/files". So I need to copy my files from "Internal Storage" on my previous phone to "/data/user/0/myApp/files" on my new phone.

I guess my first question should be: Is there a way for my apps on my new phone to access files in "Internal Storage"? If so, then I could simply copy the files over to my new phone. But, if my apps can't access "internal Storage', then how can I copy my files into "/data/user/0/myApp/files" on my new phone so my apps can access them?.

Does this clarify my question?