External hard drive, gives you more easier to manage your data. External hard drive is useful and simple to attach to your personal computer or notebook. Once you can plug it in your PC or you can unplug it when you finish you're work.
Data which is very important to protect from crash and malfunction is save in your external hard drive.
Advanced Technology Attachment (ATA) sometime called as IDE, is a standard interface for connecting storage devices such as hard disks and CD-ROM drives inside personal computers. But, recently the newest standard is call SATA (Serial ATA) comes with better specifications.
Magnetic storage uses different patterns of magnetization on a magnetically coated surface to store information. Magnetic storage is non-volatile. The information is accessed using one or more read/write heads. Since the read/write head only covers a part of the surface, magnetic storage is sequential access and must seek, cycle or both. In modern computers, the magnetic surface will take these forms:
- Magnetic disk
-->Floppy disk, used for off-line storage
-->Hard disk, used for secondary storage
--> Magnetic tape data storage, used for tertiary and off-line storage
