Can You Guess, What Is This?

SCROLL DOWN FOR THE ANSWER
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Its a hard disk in 1956….

The Volume and Size of 5MB memory storage in 1956.

In September 1956 IBM launched the 305 RAMAC, the first computer with a hard disk drive (HDD). The HDD weighed over a ton and stored 5MB of data.

Source : Khaleelur Rahman – India