Storage Devices

Hard disk drive

In a personal computer, a hard disk drive  is the mechanism that controls the positioning, reading, and writing of the hard disk, which furnishes the largest amount of data storage for the PC. Although the hard disk drive  and the hard disk are not the same thing, they are packaged as a unit and so either term is sometimes used to refer to the whole unit.

                                                       Memory Stick/Flash drive 

A USB flash drive is a data storage device that consists of flash memory with an integrated Universal Serial Bus interface. USB flash drives are typically removable and rewritable, and physically much smaller than a floppy disk. Most weigh less than 30 g. As of September 2011 drives of 256 gigabytes are available,and storage capacities as large as 2 terabytes are planned, with steady improvements in size and price per capacity expected.

 CD Rom

CD ROM, stands for Compact Disc Read Only Memory, it is a type of storing data that goes up to 1 GB. It is an optical disk  that has the capacity to store data, music files, video files etc.  A single one has the average capacity to store the memory of about 700 floppy disk, which is equal to 3000,000 text pages. Once it is filled up with data, new data cannot be entered on it. First of all it was designed to store only the music and video files, but later this format has also been adapted to store the binary data of the computer. They are particularly used to distribute the computer software that can include, games, multimedia application etc.