Types of External Hard Drives The external hard drives are used to store the data from the computer or the lap top. There are two types of external hard drives they are the desktop and the portable hard drives. The external hard drives are available in different shapes, size and storage capacity. The smaller drives are said to be portable with the storage capacity of 80 to 800 Giga bytes. The smaller capacity hard drives will have the fast opening option. You can plug the USB cable in the computer socket and they help you to attain the connection between the system and the external hard disk. You just have to plug in with the cable and install the program easily. There is a common procedure to remove the external hard disk without causing damage to the system and the external hard drive. While you are planning to buy the hard drive make sure that the website has the positive external hard drive reviews, good connectivity, speed of transferring data etc… The data from the hard drive is controlled by the wireless connection. The internal hard drives save huge amount of power than the external hard drives. The external hard drives can be divided into two types mechanical and electronic. The external hard drives are used by people who want to transfer large amount of data remotely. There are different types of connection for connecting to the interface as the connections differ from one another. First decide the connectivity source before purchasing the external hard drive.