Problems such as recordings missing, random beeping, or stuck issues are related to the cards being used. some cards are not very suitable to be used in dashcams.
In order to ensure the stability and best performance of the camera, please refer to the blog and phone when choosing your card for our dashcam.
https://www.viofo.com/en/blog/viofo-mlc-microsd-cards-b12.html
You are also recommended to format the card periodically,
This is also a tool you can use to format your cards deeply.
https://viofo.com/download/guiformat.exe
For further help, contact VIOFO customer service by email: support@viofo.com