Disk, SSD, HDD
Disk is a physical part of your computer (or server) where you store data. Things like files, software programs, and settings are stored on your disk; it’s generally for long term storage, because it’s kind of slow to access. Short lived data – like where you are in the song you're listening to – is stored ephemerally in memory, not disk.

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What are computers?
Computers take directions and do them exactly, like investment bankers.
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