According to BuzzFeed, this is picture of 200 MB of storage back in 1970.
From the look of that thing, you could physically fit more copies of Beck's worst CD inside it than you could stores MP3s of the album on it! I'm not sure why anyone would have that many CD copies of Mutations lying around though.
It's amazing how far we've come. My laptop hard drive has 451 gigabytes of storage. 200 MB is nothin'. I got PDF files bigger than that! (That's a pretty major "zinger" for computer geeks.)