Many Thanks Marble,
Yes, I could follow the thread in Spanish (understand very very little, rest with Google).
Well, it is another method. However, I have a few doubts with this method. This one helps to get a new ROM instead of Remix or Android stock using the TWRP recovery. However, it does not explain if we can change partition sizes and if yes, how.
Actually, I want to retain the stock Remix OS (at least for the time being) and only increase the Android partition size to occupy the complete storage by deleting Windows partition. I have to understand how I can use TWRP recovery to adjust partition sizes and just stopping there without going to the next steps of installing another ROM.
Do you have any tips?