An SSD is a data-storage device that serves the same basic data storage function as a hard disk drive (HDD), which is probably what you'll find in your computer right now. An HDD stores data on spinning platters, and data is read from or written onto the platter through a needle-like "head". An SSD, by contrast, stores data in blocks and has no moving parts.
ince an SSD uses a more streamlined method for reading and writing data, it provides faster performance than a comparable HDD. Replacing your HDD with an SSD will result in shorter boot-up times, faster program launching, and quicker file transfers. Overall your computer will feel quicker.
Internal SSDs must be installed inside your computer. That requires some technical skill and isn't always possible with laptops and slim all-in-one machines. Opt for an internal SSD if you're building a new computer, replacing a broken part or upgrading your machine. If you're not able to install an internal drive and just want some extra storage capability, consider an external drive that lets you save files off of the main machine.