That’s what the surface duo was. I still have my OG, and other than being fragile because its literally 2mm thicker than a USBC port on each half, its the perfect e-reader. Sadly for video consumption its not great with the boundary, but you can use it in a propped up mode which I much prefer.
Its a great phone, but certainly not without comprises, just like any folding phone.
I’ve been waiting for a 32TB to become available as well, Seagate announced that drive last year and it’s still not available outside data centers. I suspect the WD one will be the same.