The Davis datalogger will just overwrite the oldest record with the newest one, so it never really gets full.
If you clear all the data after extraction and something goes wrong then you have no data if you want to try again. 
The Davis datalogger will just overwrite the oldest record with the newest one, so it never really gets full.
If you clear all the data after extraction and something goes wrong then you have no data if you want to try again.