@Jn- came up with an alternate idea - use FAT32 on the card and the camera will automatically split up the files into 4GB. I don't have an R5 but I tested this on my RP and verified it doesn't save the NVRAM settings for each of the 4GB file splits. You can read more about it in the following two links. I've asked Andrew and J. Marcus to try this on their R5 but I don't think they've had a chance yet. Prior to that I did some work on recovering the .DAT file but stopped after the above sol