Method 1: Check the properties of the U disk. If the used space is not 0, you can use the following methods. Create a txt file directly in the U disk, and enter attrib -s -h /s /d to save it. Then turn on my computer-> Tools-> Folder options-> Check and clear the check mark in front of the extension hidden inside the known file. If it has been deleted, you don't have to do this step. Then rename the newly created TXT document to 0.bat and double-click Run.

Method 2: If your USB flash drive shows that the used space is 0, then we can borrow software to solve the problem. Download an easy-to-recover version first, and download the Chinese registered version of this software on the website of System House to recover the file.

Method 3: Insert the USB flash drive, then don't open it, but right-click the drive letter. Select "Open as a media portable device" and all files will be displayed, but they cannot be opened. Just copy to the local hard disk, and format the USB flash drive after data backup.

But the premise is that everyone must first make sure that this phenomenon has appeared on their USB flash drive, and there is no poisoning and no hidden files. If it's U disk poisoning, clean it up with an antivirus software.