- Scan your Pen drive with your antivirus software, If it caught some virus Just delete it. and this will prevent going to the next steps.
- If the problem persists even after your Antivirus run and can't find any virus, Just Do Backup of your files.
- Don't copy the whole directory.
- Just copy files which are very important.
- Don't copy Executable files or Zip files.
- In case of Zip files do extract.
3. After copying all your files, Just do format your pen drive.
4. copy all your files again in to your pen drive.