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The computers use code based on ones (1) and zeros (0). The hard disk is basically a large disk with hundreds of thousands of tiny magnets. When you "save" the hard drive "writes" in computer code what needs to be saved. There is a needle like device that hovers over the hard disk and changes the polarity of the magnets, where a + polarity is a 1, and a negative polarity is a 0. I may have the polarity and numbers backwards, but the idea is the same. Your computers basic systems can read these codes and processes them to what you see on the screen. This is why you don't ever want to get magnets near your computer or attach "non-shielded" speakers to your computer. computer changes every file you store in 2digits binary code, after tjat it will store in RAM

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15y ago

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