How do I move all the files from a folder (and subfolders) using the command line in Android 7.1+? I tried using this command: 

find /src/dir -type f -exec mv --backup=numbered -t /dst/dir {} +


sourced from here, but error messages suggest find requires root on Android. Any other ideas as to how to accomplish this? I want only the files in the destination folder (i.e. without the directory structure, all files in one directory) while maintaining the source directory structure. I've tried Termux, Terminal Emulator, and Tasker so far, without success.
Here's the answer I managed to figure out:

find /SourceDir -type f -exec mv -i {} /DestinationDir ';'