Got my OLED Steam Deck today

Current Events

What SSD do you guys use for the Deck? I have an external 2TB Seagate with nothing on it (I think), but I have no idea if that'd be good or not. Already saw stories of Redditors trying to format their stuff and it completely banjaxes their system/drive/whatever.
Take me down from the ridge where the summer ends
And watch the city spread out just like a jet's flame