What are the differences between a HDD and a SSD hard drive?

HDD and SSD have a very different operating principle:
The HDD(hard disk drive) consists of a magnetic disk and a read/write head which is on an arm accesses the data while the platters are spinning.
An SSD(solid-state drive) composed of several flash memories. It's comparable to a USB stick and therefore even after heavy falls usually still functional.
Because of the missing mechanical parts, the SSD is not only break-proof, it also has a much better performance than a hard drive.

The advantages of an SSD :

• noticeable quicker read and write speeds
• low energy requirements
• more compact design
• noiseless operation
• no data loss due to vibrations

Useful link: Informations about data recovery

HDD (hard disk drive)

SSD (solid-state drive)