Tried to record both Summerslam and RAW last night (not at the same time but one after the other). Set the timers and went to bed. Got up this morning to see the error message "error while recording disk full?". It has recorded around 160 mins of summerslam and around the same for Raw. Yet the usb (a 64 GB sandisk) is showing as still having 48GB of space left. Can anyone help with this?