I recall, over 10 years ago, yep, It was a haze of the 90's but I do recall, buying my first hard disk drive, it was, at the time a huge, it was 40Mb! Yep, that was huge in those days. You could have DOS 6 or windows 3.11 , see, told you it was a haze, it was at least 12 years ago or maybe more!
Nowadays, a 40GB, that's 1000 times bigger, may just be big enough for an office laptop with nothing extra added, by extras, I mean anything other than an office application, maybe Firefox browser, you are using that and not that Internet Explorer 7 excuse of a browser? Anyway, 40GB ain't going to get you far and in no short time will you be looking to get a bigger one. As for home PC's well they now come standard with over 200GB, you know, the multimedia PC's, with a TV on board, allows you to use your PC as recorder. You get the idea.
Well, now we have moved on to the next mile stone, say welcome to the Terabyte harddisk drive! Yep,that's the next step. Want to see what it looks like? yep, that's it below... exxxxciting!
You may be surprised to note, that well, it looks the same as a 200GB drive, but this is a 1 TB one.
More info on the history of Hardisk drives for the inner geek in you can be found
here,
here and
here.