What are the normal reading and writing speed ranges of U disk, mobile hard disk, solid state hard disk and ordinary hard disk?

The reading and writing speed of the mobile hard disk is related to the USB version supported by the mobile hard disk itself and the USB port version connected to the mobile hard disk.

The USB2.0 mobile hard disk works in USB2.0 mode. No matter whether it is connected to USB2.0 port or USB3.0 port, its typical continuous file reading and writing speed is basically about 30 MB/s because of the performance limitation of its own bridge chip and the working bandwidth limitation of USB2.0.

If USB3.0 mobile hard disk is connected to USB2.0 port, it will automatically degrade to work in USB2.0 mode, and its continuous file reading and writing speed is still about 30 MB/s.

If the USB3.0 mobile hard disk is connected to the USB3.0 port (at the same time, it is required that the motherboard has installed the corresponding USB3.0 driver to provide USB3.0 support normally), then the performance of the hard disk itself can basically be fully exerted, and the typical continuous file reading and writing speed is above 80 MB/s.