Recently I have installed lineageOS 20 on my galaxy J7 2015. Everything works properly, but I have no access to my internal storage! File manager only shows the SD cards content and I can not access the internal storage via any apps. Even when I connect my phone to my laptop, the laptop lists only SD card. Also maybe I should mention that in other hand, TWRP only has access to my internal storage and shows the volume of my SD card 0. What could be the problem?
you need to clean flash and format the internal storage
I did clean flash and wipe all of my data, but the problem exists! I went through this guide.
wiping data and formatting storage are different things
Yes, the problem has been solved! But the phone says
Format the SD card to use it! I have much data on the SD card.