Logging frequency was about 1 recording in 5 min.
That's 12 events per hour.
Last time i started the logger in the evening and in the morning i noticed that it had stopped 3.00 AM.
That's at most a 9 hour stretch.
9 * 12 = 108
The problem is that when i add a clock module to my project, it stops logging when the log-file is about 100 kb (although the memory card is 2 Gb).
This implies that you are logging about 1000 bytes per event.
Something doesn't add up here.