Yep -- a person in the 50s may not have even had enough context to be as blown away by this as someone who knew about hard drives.

My earliest memory of a hard drive capacity -- about 21 years ago -- is 130 MB (although that most certainly wasn't the upper limit). So you could have told me "This card is 1/2000th the size and has 1000 times the capacity."

2,000,000 times the data density! That's doubled almost 21 times!