🧠 Let’s Imagine a Backpack
Think of a file like a backpack.
It’s a bag that holds bytes.
You can put anything inside:
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Letters
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Pictures
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Songs
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Videos
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Code
Each file has:
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A name
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A size (how many bytes inside)
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A type (what kind of thing it is)
📂 Examples of Files
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Text file (.txt) = bytes that hold letters
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Picture file (.jpg or .png) = bytes that describe tiny dots (pixels)
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Music file (.mp3) = bytes that describe sound waves
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Video file (.mp4) = bytes for many pictures + sound
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Game file = bytes for video (graphics), code, sound, and more
🧩 How Files Work Inside
Imagine a .txt file that says:
Hello
That’s 5 letters = 5 bytes.
But those letters are saved as 1s and 0s.
The file doesn’t save “H” — it saves:
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01001000 (H)
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01100101 (e)
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01101100 (l)
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01101100 (l)
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01101111 (o)
That’s all a file is: a long list of 0s and 1s stored in a special order.
📥 Saving = Writing Bytes
When you hit “Save” on a file:
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Your computer takes the bits and bytes
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It stores them on memory chips or a disk
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Later, when you open the file again, it puts the bytes back together
That’s how files help us remember things for days, weeks, or even years.