I wish this forum was more active. No one seems to get answers here. I have a similar question to you so hopefully someone will chime in or you might come back with what you’ve learned since.
Hmm I would say you should use this one:
10 gb for android (andorid will have 8-9 gb)
The rest wlil go to windows (Windows will have 50-55 gb)
And just to remind you that- be carefull how you flash – because you could delete the windows partition so you would need to reinstall windows..
So i dont what your trying to do , but if your trying to update the rom – choose flash system only..