> Now, let’s go back to that first hard drive, the IBM RAMAC from 1956. Here are some specs on that thing:

> Storage Capacity: 3.75 MB

> Cost: ~$9,200/terabyte

Those specs can't possibly be correct. If you multiply the cost by the storage, the cost of the drive works out to 3¢.

This site[1] states,

> It stored about 2,000 bits of data per square inch and had a purchase price of about $10,000 per megabyte

So perhaps the specs should read $9,200 / megabyte? (Which would put the drive's cost at $34,500, which seems more plausible.)

[1]: https://www.historyofinformation.com/detail.php?entryid=952