A:Answer At the moment, even the standard setup with “only 1TB” is hard to come by and on backorder! So, though special orders of 2, 3, & 4TB drives are possible, it’ll be a while in coming.
Initially, I wanted a 2TB Drive, but when I saw that by adding it, I’d have to wait an extra month(!!!), I went for 1TB! On the plus side, that saved me $400, which I’m putting toward more cloud (which was already becoming a necessity), a few USB-C thumb drives (which I kinda needed to get anyway), and possibly another external drive. And that still leaves me with some of that $400 left! :-)