What Is The Difference Between Pen Drive And Hard Disk?

Pen Drive an external and portable media and smaller in size and is based chip where Hard Disk is a Primary Storage and is based of Magnetic Plate and stronger, and long life media.

pen drive is made up of chip !! There is Platter in Hard Disk (Magnetic Platter).

pen drive smaller as compared to hardisk and can be easily carried .

Pen drive is small in size  it is easy to carry