Yesterday I went flying with my P3A. I would properly stop the recording in the DJI GO app on my ipad mini 2 and properly power down my P3A before changing batteries. I found out that for some reason the video files kept writing over the files named DJI....1. and DJI....2. I lost a LOT of footage before I figured out that it was writing over the files on the SD card! My file index mode setting was set to "Reset". I am going to change it to "Continuous" to hopefully avoid this in the future. I never had to do this before. Not sure why this has all the sudden become an issue.