Teachers usually use PPT in class, and sometimes they play videos. Teachers speak faster and students can't keep up with the pace of class. When class is over, students take a USB flash drive to the teacher to copy the materials, and the teacher will generally be happy to accept it and copy it back to the computer for review. Sometimes the teacher will assign homework and copy the materials by himself. If students like watching videos, they can use the capacity of 128G.

meaning

U disk integrates disk storage technology, flash memory technology and universal serial bus technology. The port of USB is connected with the computer and is the channel of data input/output; The main control chip allows the computer to recognize the U disk as a mobile disk, which is the "brain" of the U disk; The flash memory chip of a U disk stores data, which is different from the memory of a computer. Even if the power is cut off, the data will not be lost. The PCB backplane connects all components together and provides a data processing platform.