Constant beeping indicates recording is interruppted, most of such issues are related to the microSD card and connection. You can try the instructions below to solve the issue:
① Format the card to FAT32 first, try a deep formatting by. this tool if issue persists.
Micro SD Cards play an important role in dashcams, please make sure your card is among the recommended ones.
② If you use more than 1 channel, please unplug the back cameras to test if the main body can work alone.