How to view hidden files in a USB flash drive:

Open My Computer, click the Tools menu, and then select Folder Options from the pop-up menu;

In File Switch to the View tab in the folder options dialog box, then check the "Show the contents of system folders" checkbox, and then select the "Show all files and folders" radio option below;

And then Select the check box in front of "Hide protected operating system files (recommended)", click the "Yes" button from the pop-up dialog box, and then click the "Yes" button to save the settings;

Return to U In the root directory of the disk, you can see that all the contents of the USB disk have been displayed, and the hidden files are displayed in a semi-transparent state.

What should I do if the files in the USB flash drive suddenly disappear?

Check for viruses: Open the computer’s anti-virus software and scan the USB flash drive for anti-virus;

Open the “Tools” option in the computer folder to reveal all hidden files ;

Use data recovery software to copy the files, and then format the USB flash drive. If the files are particularly important, do not restore them yourself. It is recommended to find a professional data recovery company to restore them.