Hello everyone!
So, I updated my F770 dual dashcam to the .08 firmware and... boom!
My Hama 64 GB micro SDHC, which I used in the previous firmware version, .06 I guess, and which is a couple of months used, refused to work. The camera, after a couple of engine starts, with or without parking mode, but mostly parking mode on, advised me that "memory card error, restarting" and kept buzzing in that way. So, after reading this topic and others, I decided to give it a try by downgrade the firmware, from .08 to .05 (actually is .06 in Camera info), and not works, no more audible warning messages form my precious F770
So, one could get rid of the audible Memory Card Error by downgrade the camera with a previous firmware, and STOP USING THE .08 ONE.
BTW, the Thinkware F770 is the best dashcam. Dunno about F800, but I am very pleased about it and actually saved me from arguing in an accident, so the police decided after watching the recording that I was in the right lane, so the money from the insurance company covered the dashcam for about 3 times
Safe driving and smooth rides my friends! ;-)