It includes all forms of storage except for USB devices, GPUs and high end CPUs. The latter you can still get but you're going to have some severe sticker shock.

I read it as both, but UK suppliers have stock of various SATA HDDs available in large and small sizes. It's hard to say if prices will rocket or availability decline, or both. I don't normally advocate panic-buying, but if it's needed now is the time. I have one NAS spare on hand, I don't want or need a drawer full of them, but it'll be a royal pain if I do and can't get parts.