What is Hard Drive:
Hard drive is a data storage device. Hard drive comes from English hard disk and is one of the components of memory system that computers have to store information.
A hard drive is characterized because does not require electrical current to store data and that is why it is the device in charge of storing the long term data and start the computer. When the hard drive is inside the computer they are called Internal hard-drive.
There are four types of hard drives:
SSD: Solid State Drive or solid state drive has a composition similar to that of flash memories and USB memories. SATA III: These are the so-called rigid hard drives located inside the computer made up of several disks that store information magnetically. To read the information contained, the disks must rotate at high speed while a ‘reader head’ reads the information. SCSI: They are for more professional use and are generally several in a rack. SAS: It is a more modern version of the SCSI hard drive.
He external hard drive fulfills the same logic as the one inside the computer (SATAIII) but is not part of it, having a Case for protection and transportation and is generally connected by a USB connection (Universal Serial Bus).
The SSD hard drives They are the most advanced technology in portable hard drives and have the following characteristics:
They are silentThey are fasterThey consume lessThey are more resistant