https://www.labmaker.org/collections/earth-and-ecology/products/audiomoth-v1-1-0

No, many of them. Every device that stopped working before planned had it's clock messed up. By the end of the day I will be able to give precise numbers on how many of the 40 AudioMoth devices stopped working properly. I just arrived from field and I'm in the process of sorting things out. I would say around 20 or more. In the meantime: when I move the recorded WAV files to an external HD, the information on "More Info" section disappeared. Is it normal? Info and comments are visible only in the folders where I downloaded the files straight from the microSD, but not on the copied files I moved to an external HD.

Some additional info: I've updated every device to firmware version 1.4.4 expecting it solved the problem, because we're amidst a big project involving the federal government and the devices must be in the field to collect data. After updating firmware, formatting microSD cards and configuring schedule all over again I plugged the devices back to computer to check if the clock was ok before deployment and it seems to be ok. I noticed that on the devices that stopped working around day3, the clock was messy: each second was taking 3-5 seconds to pass and the exact time was nowhere near where it should be. Now I'm worried that not even the 3-day data can be trusted, because I'm not sure if the recordings started at real time.

Hi Andy, On the devices that stopped recording: They seem to be the right length of time for each recorded period. WAV comments are just about battery, gain and temperature. Attached to this message you can see the info about the last recorded file on one of the faulty devices and the correspondent txt file as well. The temperature reading is not accurate.