author avatar
    Senior Program Developer


Car dash cam is the standard equippment of each car. Many people prefer to install one when they bought the cars. In this essay, we will talk about how to set loop recording and how to recover the overwritten video data.

Part 1: About Car Dash Cams

Car Dash Cam is a tiny video camera. This installation behind the front windshield can record the videos and voices during the driving process. Most of the car dash cams are equipped with the parked vehicle surveillance system that can monitor the vehicle when the driver is absent. Besides, videos and voices record in the car dash cam could be the powerful evidences in traffic accidents.

The followings are universal car dash cams:

Hidden cameraMini cameraRearview mirror cameraWireless streaming rearview mirror cameraTouchscreen dashboard
Imagehidden camera car dash cammini and portable car dash camrearview mirror car dash camstreaming and wirless rearview mirror car dash camtouchscreen dashboard car dash cam
Installation positionOver the rearview mirror base, behind the rearview mirrorBehind front windshield, over the rearview mirror baseOver the rearview mirror baseOver the rearview mirror baseOn the center console
Way to fixReplace the rear view mirror base and fix with glueSuction cup and glueReplace the rear view mirrorReplace the rear view mirrorFixed bracket
Support the third-party module×
Support the third-party software××

Part 2: How to Save Data into Car Dash Cam

1. Segmented recording

Generally, users can set the recording time in the car dash cam, 1min, 3mins or 5mins. These videos will be saved in the SD card. As the storage space becomes full, these videos will be automatically deleted to make room for new videos. That is also the principle of loop recording.

2. Loop recording

Loop recording is the basic function for the current car dash cams. By default, it is opened all the time. Yet, when the storage space is almost full, the previously saved videos will be overwritten (except the emergency locked videos). If you close loop recording, the videos will not be overwritten any more. If your car dash cam has reminded you to format the full disk, it is proved that loop recording is close.

How to set loop recording:

① Go to the Setting menu. Then, find out and select [Loop recording].

② Then select the video duration: 3mins, 5mins or 10mins. We suggest a video should be from 2mins to 3mins.
set to be loop recording in car dash cam
Note: The details may not be completely identical with the case because their models and brands are different.
Some people doubt that loop recording will overwrite the previous videos saved in the accidents, which will not be able to collect the evidence in the future. Don’t worry! When an emergency happens in a vehicle, G-sensor will be aroused automatically and then it will save and lock the accident videos in fear that loop recording overwrites them. We can say that loop recording is very useful because it greatly utilizes the storage space but also lowers the storage cost.

3. How long can be recorded on Micro SD card

Micro SD card, the standard storage card of the car dash cam, ranges from 8G to 128G. You can view the manual to buy a suitable micro SD card for the card dash cam. Generally speaking, a 1080P video at the rate of 25 FPS can be 90MB per minute. That is to say, an 8GB storage card can record videos for 90 minutes without emergency storage.

If you want to store more videos, please choose the card at high capacity. Now, most of car dash cams support the SD card up to 64GB. You can check the product instruction to know whether your cam can change a larger card.

Part 3: How to Recover Overwritten Data on Car Dash Cam

Whether the overwritten video data is recoverable, it should follow these cases:

  • If the card dash cam does not record new videos or just record some short videos, it is possible to recover the overwritten data.
  • If the car dash cam records many videos on the sectors where the past videos were deleted, it is hardly to recover the overwritten data.
Hot Topic - ADsRenee Undeleter - Professional Data Recovery Software

Easy to use Only simple steps to recover data from storage devices.

Multiple scan modes Fulfill different data lost and recovery needs.

File types Recover pictures, videos, audios, documents, mails, etc.

Supported storage devices Recover data from recycle bin, SD card, external disk, etc.

Supported System Windows 10, 8.1, 8, 7, Vista, XP, 2000 and Mac OS X10.6, 10.7, 10.8.

Easy to use Simple steps to recover data

Recover different file formats Support to recover multiple file types

Support different devices Recover data from multiple storage devices

Free TrialFree TrialFree Trial 1000 users have downloaded and recovered data back!
If you want to recover videos which have been deleted for a long time, many online methods do not work at all. We suggest you use Renee Undeleter, the professional software for data recovery. It supports various file types and goes the disk thoroughly to recover data.

① Download and install Renee Undeleter.

② Use the card reader to connect the SD card to the computer. Then, run Renee Undeleter and select [Fast Partition Scan].
select the function fast partition scan in renee undeleter
③ Select the target SD card and click [Next].
select the target drive to scan in renee undeleter
④ Select [Deep Scan]. It takes a long time to scan the SD card. Please wait for it patiently.
select fast scan mode in renee undeleter
⑤ After that, preview and check the target files. Then, click [Recover].
select the target files to recover in fast partition scan
⑥ Finally, select the output destination to save the files.
select the destination to save the recovered files in renee undeleter
Tips:Renee Undeleter can recover not only the data on the car dash cam but also the deleted videos and the other data saved on the SD card.