Loop Recording Issue

[amand4u]

I just got the A129 Duo and It worked perfectly until last week. I checked my sd card several times before and all the files were kept. I have the 64gb SD card that comes with the camera kit that I got for $190. But since the last 2 weeks, all my videos were deleted and it seems like only 156 minutes of files are kept inside of the SD card, which is only ONE day of driving for me, and not even close. I thought Loop Recording will keep as much data as 64GB SD card can take, but 156 minutes of footage doesn't seem to take up all that space, Am I wrong?
Does anyone know how to fix this? Could I have done anything wrong or is it the camera's, and or SD card's problem?
PLEASE HELP!!!

 

[Systeman]

It may be a good idea if you were to define your camera settings. There might be a conflicting setting. Others' may have had similar issues and diagnosed the problem.

What is the firmware version?

 

[Mar.S.]

A 64GB memory card can hold only about 4 hours of video (high bitrate) from two cameras.

 

[viofo]

Please try to format the card in the camera or use the GUIFORMAT tool if you use windows.