When attempting to Transfer files from XL4 to S3OLED (model 648.) The blue light is on, but file does not show up in now playing list, and does not transfer. Any subsequent file transfer requests do not transfer either. Tivo left to run with blue light on for over 12 hrs. The blue light stays on without any file transfer until tivo is rebooted. All other TiVo functions are operational. Subsequent file transfer attempts, after tivo is rebooted, may or may not take place.