Update!
Got another SD card. This time it's a real SanDisk Ultra
Plus C10 128GB SD. (Tested good with FAKEFLASHTEST).
I know these aren't the best cards to use, but since the counterfeit version worked OK and the new one was cheap, so I thought I'd give it a go.
Formatted it using Quick fat32format on a Win7 PC.
It worked flawlessly for the first 20 hours or so including a 15 hour roadtrip and the files were rolling over properly running at 2560x1080 30fps -superfine. GPS logs were accurate.
However, when it got to about file number AMBA0505 (had overwritten the first 80 or so), it threw an error something like 'Card size exceeded for video recording'.
The card was full, but it had been full since about file AMBA0420.
I deleted 2-3 files off it and it worked for another 10 files, then errored again.
So, I deleted another 2-3 files off it and it worked for another 10 files, then errored again.
I figured the card was due for a 'freshening', but I didn't have a PC with me so I used AParted on my Android phone to reformat it.
The cam didn't like this.
It would work for about 10 minutes then do the 3 chimes (more like barks!) and freeze with all 3 lights on & screen dark. After a minute or two the cam would shutdown normally by itself.
This was very consistent. It would record 3 & 1/2 (3 minute) files on car start and then crash.
It did this about 10 times in a row. I didn't touch the cam. I just let it fail as I was on a long trip & didn't have time to mess with it.
Oddly, on the last leg of my trip it started and worked fine for an hour with no errors.
I reformatted the SD card using fat32format - using Full (non Quick) format (took > 2 hrs)
Cam worked fine for about 1.5 hours & 5 cycles then threw the 'Card size exceeded for video recording' error and would not start recording.
I reformatted the card again. This time using Quick Format.
Still getting the 'Card size exceeded for video recording' on about every other car start.
I did figure out that once it errors, if I just manually power down, power up, and manually hit start recording, it works.
Why does the cam think the 'Card size exceeded for video recording' ?