For my third-year Bachelor project, I'm working on bats populations and using 2 Audiomoths. A week ago, I had encountered the problem of empty files with one of the Audiomoth (not both). The Audiomoth was recording empty files all night. The first issue was the batteries. I changed them but still had the issue. I saw on the forum that it could be the SD card and I changed it. The problem was solved, except that now, I have the issue with the second one!
My lecturer provided me the Audiomoths and the 2 SD cards. He bought everything at the same time and the SD cards are both the SanDisk 32 GB.
It seems that there is an issue with this type of SD card and I would like to know if anyone had the same thing. Did you solve it with another method other than using another type of SD card? If there is no other solution than changing the card, I will have to use only 1 Audiomoth instead of 2 unfortunately. I also would like to be precise that the 2 SD cards are functional. I can read them on a computer and use them to transfer files for example.
Thank you for reading and thank you for your possible responses!
Just to let you know that last night recording worked well! So it seems that reformatting the SD card works pretty well! I hope it will continue in this way! Thank you very much for your help and I hope it also helped other persons.
We've found that there's a lot of variation in speed and energy consumption between different SD cards - https://www.openacousticdevices.info/sd-card-guide - so if you can use SanDisk Extreme cards in either 32GB or 64GB. The 32GB cards use a little less energy than the 64GB cards and this is the card that all the energy calculations in the Config App are based on.
Thank you for your answer! I cut and paste on my computer all the files. I don't think the card is full because in 1 night it records around 17GB and I have done around 15 nights. But for tonight, I tried to reformat the SD yes, so I will be able to give you an answer tomorrow! I hope it will sole the problem!
I don't think the cards are SanDisk Extreme. And the one I replaced is now a SD card with no brand and I have no issue for the moment. So I don't really know, I try to explore the possibilities
Hi Maeva, Could the SD cards be full? Make sure you reformat the cards rather than deleting the files as some operating systems just hide the deleted files and don't actually remove them from the file allocation table. Can you also confirm that these are SanDisk Extreme cards - red and gold. We use the 32 and 64GB Sandisk Extreme SD cards for most deployments. Alex