Its a hard disk in 1956
Click on: IBM 305 RAMAC
HDD with 5MB 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.
Start appreciating your 4 GB memory stick!
I wouldn't have wanted a laptop in those days!