"Turns out it was a corrupted memory card. Formatting it again (FAT32) seems to have done the trick."

"It happened again. I'm suspecting now that it has to do with my power supply? During the good flights I had a PowerModule installed and during the bad flights I was running off the BECs in my ESCs.
Has nobody else seen this?"

"This just happened to me on Copter 3.3.2. At first it worked well (set up using APM Planner on a Mac), then I tinkered with it using Mission Planner in a Windows VM and it flew just fine but when I wanted to look at the logs I found they were full…"