What is SSD (solid-state drive)? How do SSDs works?

What is SSD (solid-state drive)?

A Solid-State Drive is a storage device that stores data persistently on solid-state flash storage. It is non-volatile storage device so; data is safely stored even when the power is turned off. As I have already explained about Hard drive in my previous post, that hard drive have moving parts like platters with read/write head. But SSD have no any moving part, that is the reason why SSD stay long than a traditional Hard drive. A SSD is also known as Solid-state disk.

HDD vs. SSD

The hard drive have a platter and read/write head, data is read or written on platter using read/write head. If read/write touches on platter, then hard drive may crashes. That why, I think SSD is better than HDD.

An SSD does functionally everything a hard drive does, but data is instead stored on interconnected flash memory chips that retain the data even when there's no power present. The chips can either be permanently installed on the system's motherboard (as on some small laptops and ultraportables), on a PCI Express (PCIe) card (in some high-end workstations and an increasing number of bleeding-edge consumer systems), or in a box that's sized, shaped, and wired to slot in for a laptop or desktop's hard drive (common on everything else). These flash memory chips are of a different type than is used in USB thumb drives, and are typically faster and more reliable. SSDs are consequently more expensive than USB thumb drives of the same capacities.