U disk does not display files but takes up memory
Open the U disk and find that there is nothing there. Don’t worry. Let me tell you how to solve this problem.
Method 1:
Step 1: Insert the U disk into the computer, remember the symbol of the U disk, for example:
after win+r, enter cmd, and click OK. 
Step 2: Enter the symbol corresponding to the U disk and press Enter, and then enter attrib -s -h -r /s /d and press Enter.
For example: 
if you find that there are more files in the U disk that you have never seen before, such as My Documents autorun or something basic It can be deleted.
Method 2:
1. Click the left button of the mouse to view the properties of the U disk. If the used space is not 0, you can continue with the following steps.
2. Create a new txt file directly in your U disk and enter attrib -s -h /s /d to save it.
3. Then open My Computer->Tools->Folder Options->View, and remove the tick in front of Hide Known File Extensions. If it has already been removed, there is no need for this step.
4. Then rename the newly created TXT file to 0.bat. Double-click to run.
——Yan Haobo
2021/4/7