Flew again today. Log file transferred to Nook with no problems. Last week's log file still would not complete transfer. Took FLARM's SD card home, found all the files on it, and the one that wouldn't transfer seems fine. That file is larger than the other recent ones, but an even larger one transferred OK last year. Could the issue be caused by the FLARM firmware update (version 6.83) that I did this year?