1, SSD transmission speed can reach 500MB/s, including reading speed of 400-600MB per second and writing speed of 200MB per second. However, the reading speed of the traditional hard disk cannot exceed 200MB per second, and the writing speed is about 100MB per second. If you encounter discontinuous scattered data, SSD can show extremely fast reading and writing speed. However, the transmission speed of the traditional mechanical hard disk is very slow due to the seek of the magnetic head.

2, security, SSD has no disk, so as long as its chip is not deformed by shape extrusion, data can be safely saved. However, the traditional hard disk does not have this advantage. Once the disk collides with the magnetic head in the process of high-speed rotation, even unreasonable contact will cause disk damage and data loss.

3. Economical and practical. With the same capacity, the current SSD price is 3-5 times higher than the traditional HDD. However, with the development of Moore's Law, the density of NAND flash memory chips of SSD will be higher and higher, and the storage capacity will be higher and higher, which will one day replace the traditional secondary storage devices.