
Baldur's Gate 3 is going to be a very big game—in the neighborhood of 122GB, according to Larian—and it brings me no pleasure to inform you that you will not be able to preload any of it in advance of the August 3 release date.
There's been quite a bit of speculation and confusion about Baldur's Gate 3's preload situation, and Larian hasn't been forthcoming on that front. In an interview just last week with itmeJP, Larian boss Swen Vincke said he actually didn't know how preloading would be handled.