The default recording time for most Series 2 Dash Cams is one minute for each file, making sizes manageable and easy to view, but this can be increased to three minutes. At 1080p HD, you will get up to four hours of recording before the cam loops over.
The volume of recorded data depends on the size of your SD card. The 32GB records around 2 hours of footage. The 64GB around 4 hours and the 128GB around 8 hours.
By altering the recording resolution, or adding a rear camera, the recording capacity can be either increased or decreased. For example, recording at 720p resolution will increase the recording time compared with recording at 4K Ultra HD.