However; v0018 will support any storage type; USB key, SSD, HDD, m2 SSD ect. So, I would recommend waiting to download v0018 if you don't have your components yet and plan on using a HDD or SSD.
Thanks for v00018!. Could you please add guide for hdd installation.
It is the same build process from any storage medium.
The only difference I can think of is when using Etcher; you will need to click the gear at the top right of the application window and enable unsafe mode (before it will allow you to image to a SSD or HDD).