Answer to: How to merge Internal memory and Device memory?Hey, It *IS* possible, thanks to XDA Dev mickybart. Not easy process at all though, check this guide on XDA. Make sure to flash Android 7.1 in the end (https://forum.xda-developers.com/xperia-s/s-development/rom-naosprom-xperia-s-t3462373)! Your warranty will be void by doing this. If you run into problems, do not hesitate to ask at that forum (the 7.1 ROM thread.) PS: Rooted phone is necessary :) Good luck!