Hard disk Drives Vs. Flash Drives

Hard disk drive is a non-volatile data storage device that stores data on a magnetic surface layered onto hard disk platters.

The information is written to the disk by applying a magnetic field from a read-write head, which in turn changes its magnetization due to the field. The information can be read by a magnetoresistive read-write head which senses electrical change as the magnetic fields.

Flash drives is also a non-volatile data storage device, they are small enough to be carried in a pocket and can plug into any computer with a USB drive. They have less storage capacity than a hard drive, but they are smaller and more durable because they do not contain any internal moving parts.