Razer Blade Stealth hard drive upgrade

I’m considering purchasing one of the Razer Blade Stealths in the future and have a question regarding hard drive upgrades. I’ve built most of my own systems including laptops in the past but can’t find a BYI chassis this formfactor yet. I need more that 512GB hard drive and my first course of action would be to up the SSD to 2TB. I bought a laptop from another manufacturer in the past that was “enthusiast” marketed but had stickers all over the screw holes saying “warranty void if removed”. I understand if I pooch the system it’s my problem but is opening the bottom even allowed without voiding the warranty? If so is a custom build or even sending the desired hard drive to Razer for install an option. Second does the system support a 2TB capacity and NVE?