| One hard disk drive is required at least by every | | | | that can be effected by the offline or the online |
| computer system for the storage of OS, user | | | | threats. The important documents, DVD images, music |
| information, programs and applications. Usually the hard | | | | files, disk images and backup of main internal drive's |
| drive is internal, but with the evolution of different | | | | content can be stored safely and securely on the |
| requirements, threats and working conditions, the | | | | external drive. External hard drive can be powered off |
| external hard disk drives have gain popularity and their | | | | when the user is online. |
| sales are also increasing. The access to internet | | | | External USB drives benefits its users because it |
| exposes the computer systems to threats that include | | | | operates on the basis of plug & play and is also |
| spywares, viruses and Trojan horses. So even after | | | | portable. Computer system that has the capability of |
| the employment of antivirus and firewall programs, it is | | | | firewire or the USB recognizes the external drive, and |
| very much difficult to protect the computer systems | | | | a letter is assigned to it for its designation as storage |
| from these threats. Besides the online threats, different | | | | device. Afterwards the user can access the external |
| members of family who are using the same computer | | | | USB hard drive just as the system's main drive. |
| system, put their critical data at higher risk of loss or | | | | External drives make is easy to transfer huge volume |
| unintentional corruption. | | | | of critical data from your office to your home, or |
| More storage space is needed for the rapid increase | | | | between your laptop and desktop. The favourite |
| in multimedia because of DVD burning, streaming video, | | | | programs of the users can be made virtually portable |
| picture files and MP3s as large storage space is | | | | by just plugging in the external hard drive and create |
| required by them on hard disk drive. External USB hard | | | | working environment. If multiple members of the family |
| drive is the solution to all these threats and | | | | use the same system, then the external drive is the |
| requirements. The external drive remains outside the | | | | best choice and solution for keeping the sensitive |
| system with in its enclosure which is little bit larger in | | | | information safe and secure. The user can have all the |
| size and sometimes it also has a cooling fan. In this | | | | data available by just by plugging in the external drive |
| way the user can store the data on the hard disk | | | | and can access the programs and data. When the |
| drive that rests outside the computer system. Interface | | | | user has finished his work, all he has to do is just |
| cable of high speed is used to connect the external | | | | unplug it and he can take it with him where ever he |
| hard drive to the computer system. | | | | intends to. |
| The communication, back and forth movement of the | | | | There are many benefits of the external drive and that |
| data between the external drive and the computer is | | | | is why its users are increasing with the passage of |
| done through this interface cable. Common typical | | | | time. The users can even use many external drives |
| interface types are firewire & USB (universal | | | | and then in the same enclosure they can swap them. |
| serial bus). External drive is very helpful equipment as it | | | | They can use one of the hard drives for several |
| helps to store backup data of the important and critical | | | | purposes like data backup, images storage, multimedia |
| documents separately and away from the main drive | | | | storage etc. |