no warning message for writing logs to SD card if not available

[yak-54]

I have X20 pro on 1.6.0
i had an issue with rssi critical warning less the 250 meters away with TD-18 on the first flight with the radio after updating

i just updating RF system to 3.0.1 on X20 pro
so i went into the logs folder read the log no log had been recorded
i forgot to put back in the SD card after the last days flying
as i write the logs to the SD card
it would be nice to get some warning sd card found on bootup or default back to log folder on the Nad drive if cant find them

without any logs now of the issue i have fly it again i it was critical warning i will change out the TD-18 with new on fly it again

This was my Bad i Left the SD card out

[pmullen503]

I suppose it makes sense to ignore file errors in flight but a check to see if the SD is there and works at startup if it's used in a SF is a pretty reasonable ask.

[bsongis-frsky]

Add another error in that case makes sense