1. Connect the USB drive to your computer.
2. Open the video file you want to copy to the USB drive.
3. Click on the "File" menu and select "Save As".
4. In the "Save As" dialog box, select the USB drive as the destination folder.
5. Click on the "Save" button.
6. The movie file will be copied to the USB drive.
Note: Make sure that the USB drive has enough space to store the movie file.