Just bringing up an old post as I too now have the same problem with the recycle/loop not rewriting over the first files once the card is full. Once card is full the unit turns off.
I have tried changing the 'timer' of 1 min, 3 min and 5 min, but nothing fixed it.
I have updated the software to 20140919, but hasn't fixed the problem (this software is for gps + 2 cards. mine is gps + 1 card but think the 1 card software will make a difference. The 2 card s/ware has a much better thumbs up rate).
The G-sensor and motion detection are both off.
The only way I can fix this is to format the card (done on PC and within unit) once the card is full and all ok until it fills up again and turns off.
(The card is the original since I got the unit and all ok. This problem has only occurred since receiving a replacement 0803 for a faulty one)
Any help greatly appreciated.