GoPro HERO 4 Black User Manual page 24

/ Video Mode
Looping Intervals
Available intervals for Looping are 5, 20, 60 and 120 minutes. For
example, if you select a 5-minute interval, only the previous 5 minutes
is saved when you stop recording. If you record for 5 minutes and do
not press the Shutter/Select button [
] to stop recording and save,
the camera begins a new 5-minute interval by recording over your
previous 5 minutes of footage.
You can also select max video as the interval. With this option, the camera
records until the memory card is full, then overwrites the content.
Note: To use Looping, be sure that your microSD card has sufficient space.
PRO TIP: Multiple chapter files are written to your memory card
so that small segments of content can be overwritten during loop
recording. When viewing this content on a computer, you see separate
files for each time segment. Use GoPro software to combine the files
into a longer video.
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