trouble transferring flight log from FLARM to Tophat

On Saturday, June 20, 2020 at 11:33:56 AM UTC-4, Nick Kennedy wrote:
Did the storage capacity in the Nook fill up?
Or is it unlimited storage and new IGC files erase the old ones to make room.
Maybe when you downloaded that old file it just re-wrote it and didn't take up any more space?

There is almost a gigabyte of free space in the Nook's SD card. And even more in the FLARM.

One thing I learned from the test transfer of an older file: Tophat on the Nook (presumably) names the file with today's date rather than the flight date as I expected. E.g., the file 2020-06-14-FLA-7LW-01.igc re-transferred on June 19 as another file named 2020-06-19-FLA-7LW-01.igc with identical contents. I wish I'd brought the FLARM SD card home to check what files are on it.

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?