How does a Hard-disk work?

Q: How does a computer Hard-disk work? No links please... Your own words! And i need HOW it works, not WHAT for...

A: Hard disk is made up of multiple mettle platters. On the platters are low and high magnetic signals. A high magnetic signal is a 1 and a low magnetic signal is a 0 (1's and 0's make up all information on a computer.) The platter/disk spins. A "head" reads the signals (moving toward the center of the disk or back to the edge to read different tracks (rings of info around the disk). Information is passed to the computer. and changed by the head as necessary. That would probably get you minimum score ...

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