It ' s a hard disk drive back in 1956... With 5 MB of storage!
In September 1956 IBM launched the 305 RAMAC, the first "SUPER"' computer with a hard disk drive (HDD). The HDD weighed over a ton and stored a whopping 5 MB of data :-)
Here it's shown being carried by a pedestrian operated fork lift truck.
The truck looks remarkably like an old Yale M15 or M20. Can anyone identify it properly?