how is data stored in CDs and USB?

Question

I get that in vinyl records, music is engraved into the disk; when a pin is run through the grooves, vibration occurs at the same frequency and wavelengths of the music and music is reproduced.

But how is data stored in plastic cd, disket, and USB?
Is it something like water memory? Metal memory? Plastic memories?

Thanks! Hope this post doesn’t get banned because I really wanna know!

In: 0

Answer 1

CDs store information in a similar way to Vinyl Records. 1’s and 0’s are engraved on an aluminum platter that is read by a laser.

Music is encoded digitally and written on the CDrom as a series of 1’s and 0’s.

USB drives use flash memory. Flash memory is a series of cells engraved as circuitry on silicon. These cells can store electrical energy even when power off. The state of each cell either charged or uncharged represents a 1 or a 0.