A solid-state drive or Solid-state disk, abbreviated as SSD, is a computer storage device made of integrated circuits.

You can use non-volatile memory (mainly NAND Flash in flash memory) as a permanent storage device or use volatile memory (such as DRAM) as a temporary storage device.

Solid-state hard drives often use SATA, PCI Express, mSATA, M.2, ZIF, IDE, U.2, CF, CFast… and other interfaces. At present, due to the difference between the price per unit and the maximum storage capacity of the mechanical hard disk, the solid-state hard disk cannot completely replace the mechanical hard disk for the time being.