I am about to crack a secret recipe but not getting time. I will try to test it on weekend if I get out of bed beating the fasting lethargy.
I have been able to make the system believe that the sd card (which is an A2 U3 c10 sandisk extreme pro. Costed me 5k for 64gb only) is not an sd card but internal memory. If I mimic it according to the procedure the system will see it as internal memory. I will have 16 + 64 gb internal memory. For external memory I have attached a usb drive which will not be used but be there just in case.
The system will install apps, loads apps from the sd which it is looking at and treating it as internal memory.
Once my above hypothetical plan work in real like it is too good to be true then I will share step by step recipe here for all friends.
For RAM i plan to explore options like we do in windows pc which allow using some part of the disk drive as virtual RAM. I would search if such option is there in andriod as well.
Thank you Honda Atlas for keeping us busy with this.