Reason Analysis:
These files in the U disk after antivirus still exist in the U disk, just be hidden not see it.
Retrieve lost Files:
First, create a new Notepad on your computer and enter the following code on the Notepad:
@echo off Attrib-s-h-r-a/s/d
Then click on the top left file → Save As, under the pop-up window select Save path, set file name for file recovery. Bat, save the type for all files click the "Save" button, as shown in the following figure:
Finally, copy the file to the U disk, then double-click to run, wait a few seconds after the disappearance of the file will be back to their own.
U disk is convenient for our life, but U disk virus also followed, although you can use anti-virus software antivirus, but some of the folders hidden by virus and data will not be displayed. Try this little method and you can easily retrieve the hidden data.