Can u guess whts thz ???????? Scroll down .. ?? ?? ??Its a Hard Disk at 1956.... The Volume and Size of 5MB memory storage in 1956 ... Let start appreciating your 4 GB pen drive. 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.