I don’t really get it. An SD card has basically nothing in common with a floppy disk, while USB sticks are basically the same thing as a SD card, it just uses a different interface.

Is it talking about the color or the shape or something?

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IBM released a 10MB HDD for the PC in 1983.

The most common storage format in 1984 was the 5¼ inch floppy disk which had a capacity of 360KB, though they had introduced a 1.2MB one in 1984.

7MB was huge in 1984