Can anyone tell me for sure what material the Western Digital HD are made? They shine like mirrors and seems steel.
I dismantled an old WD HD 2.5 Gb to use the neodymium magnet, and to my surprise I found that instead of a disc, it had three, stacked. I was also surprised for its mirror finish, I expected a dark brown surface, like floppies. Can anyone tell me for sure what material they are made the discs? Aluminum is not, must be steel, but it must be stainless steel or be well covered, because they shine like mirrors.