I am trying to make a direct 1:1 clone of my Android 9 system. I have the device rooted and I am running 'Terminal Emulator' as super user. Now, if I am in the root directory (IE: ":/ #") and I feed it a "cp" command like this "cp / /storage/external_sd" I get an error saying "skipped dir 'storage/external_sd//' Cross Device link".
Note, I cannot use 'ADB' because my Android device is a USB host only and I'd need to reverse engineer the circuit board to find the solder points to allow me to connect as a client so I'm trying to do it via the software on the device itself.
Reason I am trying to clone the system is because I am trying to find a particular splash logo which comes up when the device has power, but I'll need to reverse the files once I have them dumped to see which one contains it exactly.