[Ah, now he follows. Alucard nods slowly, his mind going back to what Jaskier has experienced in his time going forward on his home sphere only to return to Abraxas.]

You're correct, I simply haven't thought of that detail in some time. [oops?] I'll complicate the situation by saying that my understanding is that these storage devices will be physical objects, and thus perhaps impossible to take to one's home sphere.