My audiomoth unit stopped recording after 3 days only,
while 33.8 GB were still free and batteries are reported good
with a tester.
SD card (FAT32): reported by windows of 57.6 GB;
TOSHIBA 64 GB micro 3 XC I
Configuration file:
https://www.dropbox.com/s/uxt12u4m2gale6n/CONFIG.TXT?dl=0
The first valid file was
27/06/2021 05:05 230.400.488 20210627_050000.WAV
Recorded at 21:00:00 24/06/2021 (UTC) by AudioMoth 24410E085728D5E5 at medium gain while battery was 4.8V and temperature was 12.8C.
The last valid file was:
24/06/2021 21:05 230.400.488 20210624_210000.WAV
Recorded at 05:00:00 27/06/2021 (UTC) by AudioMoth 24410E085728D5E5 at medium gain while battery was 4.3V and temperature was 10.6C.
Then I have 5 weird files:
01/01/2098 00:03 488 19700101_000326.WAV
01/01/2098 00:05 196.608 19700101_000457.WAV
01/01/2098 00:05 294.912 19700101_000511.WAV
01/01/1601 02:00 0 19700101_000000.WAV
01/01/2098 00:07 589.824 19700101_000721.WAV
all of them with no comment field in the wav header.
Was this an SD problem?
If so, could we have a list of "certified" SD cards?
I would reformat the card and try again. Or try a SanDisk Extreme card as SD card varies significantly in their energy consumption so the predicted consumption may not be accurate. This isn't a particularly stressful recording cycle - 5 minutes in 30 minutes - and your AudioMoth shouldn't have problems running this schedule.