Explanation:
A：It is recommended to use a memory card of 16G or above. Video storage methods with different recording qualities are as follows:
| Video type | 16G | 32G | 64G |
| Ordinary video | About 1.5 hours | About 3 hours | About 6 hours |
| Emergency video | About 10 times | About 20 times | About 40 times |
Both ordinary video and emergency video are stored by cyclic erasure.If the maximum emergency video storage space is reached, the earliest emergency video will be erased. Please export the emergency video to the mobile phone or computer and other devices for backup in time.