Portable Hard disks

The world is making the things easier and easier. 20-30 years ago the computer data's are stored in a drive, where it occupies a whole room. Later They developed the Hard disk which is of smaller in size. Then the hard disk size is smaller than the note books. And at last the Pendrive, Portable Hard disks , DVD and several memory devices are used to carry the data. The portable hard disks are the developing trend which size fits to our pocket and also it has great storage size than the Pendrive has. I bought a Western Digital Portable hard disk of size 400 GB. It is easy to carry and ofcourse very stylish too.