Hello and sorry about my english... I want to know how the hard drives can get so much information acumulate... without making phisicals change to the hard drive. thanks for your time.. and again sorry

it does make physical changes; it uses a magnet on the drives surface. - W0rm

I wish all the people in this forum wrote english as well as you, including the ones who have it as their primary language.

As a person with some technical background, I am frankly, flat amazed at how much capacity hard drives have attained, and at the same time getting smaller, and cheaper. I didn't have a PC for about the first 4 year of the "IBM thing", but started my first pc with a 20 mb hard drive. That hard drive weighs about as much as my 233mhz thinkpad, with its obsolete 5gb drive. I dont know WHAT the high end for laptop drives, 20gb or more? Smaller than a pack of cigarettes. I just bought a 20 gb drive from a rip off retail outfit for 100 bucks. Back when hard drives started out, something that big would have cost more like 100 thousand dollars. I think the big thing is, PRECISION. No matter how much technology advances, the hard drive still works by magnetizing a tiny section of iron with an electromagnet. Yank out all the fancy circuitry, and the whole thing depends on how precision the platters and heads are in the drive.