Hard disk drives, or more commonly, hard drives are the data storage systems in a computer. Learn how the hard drive connects to the rest of the computer, how it's powered, just how many files can be stored on a 250 GB or 500 GB hard drive, how fast the platter is spinning and more!   

SAFETY FIRST: If you would like to follow along with our videos, please do so at your own risk. Disassembling a computer can void the warranty. Adult supervision and permission is required. Before taking apart any computers please be sure to shut down and disconnect any power supplies.