200MB Hardware Looks Like in 1970

As today you can see out 500 GB harddrive which comes out in your pocket and there are so many device which are more in size but having they not need so much place in this time of Electronics world. At the time of 1970 there are not such device are there which you could take in your pocket. Here is one example of that, 200MB device is there which is looks so big one so you people can imagine how's the 1GB hardware looks like. Looks the hard ware device of 200MB in 1970.