Hello! I just retrieved 23 AudioMoths (all v. 1.2.0, firmware 1.8.1, SanDisk Ultra 64GB micro SD cards, and Energizer Max or Max Plus batteries) from the field. Unfortunately, 18/23 devices had red and green SD card error lights. The SD cards won't register on any computers (I haven't tried card recovery software yet). Most of the cards were brand new, all were exFAT formatted and tested before deployment.
These AudioMoths were already in the field, where I replaced the batteries in July and used a laptop and the config app to set the time and configuration again. What could have gone wrong here? Is there any way to save the cards? Thanks so much.
Edit: I have just checked other cards in a couple of the devices and they are recording fine.