nonvolatile. examples include local storage (hard drive), removable storage (flash drive), cloud storage. slower than ram. for storage between computer power cycles.
this is sometimes called auxiliary storage, it cannot be read directly by the cpu. non-volatile. large capacities, can sometimes be removable. examples are hard disk, usb flash drive, ssd, cd-r.
storage that is used for data and information not currently in use. these include hard drives, solid state drives, compact disks, usb's e.c.t.