Storage
Understanding Loop Recording on Dash Cams
Loop recording is why a dash cam can run indefinitely on a single card. Knowing how it works explains why saving important clips is a deliberate step.
How the loop works
The camera records in short segments and, when the card is full, overwrites the oldest segment first. This lets it run continuously without ever running out of space.
Why clips are locked
When the G-sensor detects an impact, or you press save, that segment is locked and excluded from the overwrite cycle so it survives until you remove it.
The takeaway
Unlocked footage is temporary by design. If a clip matters, lock or copy it promptly before the loop reaches it.
Keeping the loop running smoothly
A card that is not formatted periodically can develop errors that disrupt the loop — see Formatting Your Dash Cam SD Card for how often to do it.
Frequently asked questions
Will loop recording delete footage I want to keep?
Only if it is not locked or copied off the card. Locked clips (from an impact or manual save) are excluded from the overwrite cycle until you remove them.
How much footage does loop recording hold?
It depends on card size and resolution — larger, high-endurance cards and lower resolutions hold more hours before the oldest segments are overwritten.