Anything >2TB becomes very expensive very quick
Add PCIe 4/5, M.2 form factor, non-2280 length (like SteamDeck) and extra features (if you need them) and they quickly begin zo add up to a point where it’s not feasible to buy it beyond having enough budget to not worry about that fact.
And afaik you’d need PCIe 4.0 M.2 storage to being able to use DirectStorage