Today, there are easily spoken two types of hard drives: the traditional hard drive with moving parts, and the SSD without moving parts.
The principle is simply interpreted the same as the memory in your digital camera.
An SSD is recommended if you want to speed up your computer. Laptops and PCs are faster when they are equipped with an SSD. The computer boots faster and programs also work faster. Even your old computer may start a 'second life', for a relatively low investment.