Hello everyone so i have this phone Qilive Tablet Q4 Android |7 and as it says on the webpage the phone has "8 GB built-in memory" but that's not really true because when i look at internal memory (and i mean storage not ram) i see only 1 GB and my question here is what can i do to increase from 1GB to like 4GB or maybe more and i read somewhere that with a custom rom i can fix this but i don't know how to create a custom rom so if anyone wants to create a custom rom for me and maybe for more people out there with the same problem i can give some more info (rom, build, etc).
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Please help

I didn't find the right solution from the Internet.
References
https://forum.xda-developers.com/general/help/internal-memory-fix-t3669388
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