Yesterday my computer was fine and now today the hard drive is dead.
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Hard drive can die in one second. They are spinning mechanisms that rotate 5400 times per second they’re entire life. When they stop spinning, that’s it. Modern hard drives are called “solid state” or “flash” hard drives. They do not have moving parts. They last much longer in my experience.

A spinning hard drive (also called a SATA drive) can die quickly. Some SATA drives die slowly over time and can be more noticeable as performance degrades (the spinning beach ball for example).