You do not need to be a physicist to understand the advantages of SSDs (Solid State Disk) compared to the HDs (Hard Disk): no moving parts (no mechanical parts), much less power consumed, very little heat produced, total silence, extremely competitive read/write data amount and, above all, performances that are improved continuously.

The SSDs (Solid State Disks) are, practically, flash memories. They do not have mechanical parts and, as a consequence, compared to HDs (Hard Disks), they are more robust but have lower capacity.

A SSD (solid state drive) is a data storage device and uses solid state memory to store persistent data.
Intel launched its new family of solid state drives claiming a significant performance advantage over its competitors. Solid state drives are small, lightweight and durable but they come with a high price tag and are typically slow. However, researchers in Korea have found a way of making these storage devices faster. The technique involves mixing two types of memory to increase the overall speed without also jacking up the price.