Background: I have 64 GB internal storage on my Android_Device(Rooted) with Lineage OS 16 installed without GMS(also known as GApps or Google Play) but unable to reach the usage of 4_GB(excluding the 12 GB occupied by Android System).
Objective: I request you to make a script or some Applicaion which creates a partition which act as an external Storage Device like a Pen Drive which can:
(sorted by Priority.)
#1: Run GNU/Linux in a Live Environment or even install it on the connected PC.
#2: Act as a Partition which can be accessed neither by Android System nor Any Application(s) unless privileged by the user with superuser Rights.
#3(Can be Skipped): Install MS Windows™ OS.
Note: All above task can be done using a Pen Drive, so focusing on how to … Pen drive will solve the problem.