why an electronic disk can be designed to be either volatile or nonvolotile?

Question

I am not specifying any type of electronic disk, I just want you to tell me: (why an electronic disk can be designed to be either volatile or nonvolotile?)

Answer 1

volatile memory is not disk based, it is based on a chip that uses an electric charge to store a 1 or 0. This charge has to be refreshed constantly (dynamic memory) or requires power applied (static memory) - if you remove power to either of these, the memory is lost - hence volatile.

memory sticks and disks are non-volatile