Hi
The 5.5h with 2GB file means 101KB/s logging rate. Is this with the default profile? I expect it to be around 40KB/s.
The maximum file size depends on the file system and OS, and the 2GB is apparently the size limit on NuttX, although it could go to 4GB.
Generally for this long flight hours we should further reduce the logging rate, as we don’t need high-rate sensor data.