5D II corrupted files
Please take a look of these shot with different lens but have the same corruption (1 RAW, 1 JPEG):
It is taken on a 3 days trip to China. It rains a lot. Though at the time I shot it doesn't rain. Out of about a thousand photos I shot, 4 of them have this problem, and all are from the first day.
While I know I can't save the photos, any way to prevent this to happen again? Do you know what's the problem?