Android: How do I Get Read-Only Access to System & Data Partition Without Rooting?

Hi everyone. I have an Android 7 device. It's not rooted. I need a file manager/utility that allows me to view the files & folders of the root directory; specifically the System and Data partitions. I don't need 'Write' permissions, just Read-Only. I want to copy some files. In other words, I don't want to root the device. I just need read-only access. I would prefer a file manager type app but I'm open to other methods.

I have tried Solid Explorer. It shows the System Partition but not the Data partition. Thanks.
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Theo FitchnerAsked:
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nociSoftware EngineerCommented:
FX File Explorer   from NetApp, Inc.  can help here.
together with Terminal Emulator for Android from Jack Palevich

The latter to see what mount points exist....
Theo FitchnerAuthor Commented:
Hi @noci

I have tried FX File Explorer. I want to copy some files from an app's folder in

/data/data/app folder

It simply lists the folders in /data/data   but when I open the folder of any app, its contents are not displayed and I get the message Access Denied.

I don't know how to use ABD. I'm searching for a command manual.
nociSoftware EngineerCommented:
Access denied means you will need root access..., or be allowed access to the data by permitting selinux rules.
selinux is used to keep data of applications separated so only data requests through API's are still possible.
This will also extend to the SD card btw.

See:
http://adbshell.com/
https://developer.android.com/studio/command-line/adb
Natty GregIn Theory (IT)Commented:
U used to be able to access that by connecting your device to computer via usb you can try that or enable developer mode basically putting device in mtp mode then try accessing the app data.
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