It might help here if we knew what 125% of the 80% was? The whole thing could be as simple as -
1. an Iphone 4 is part of the home network and is constantly used
2. we had been downloading many work related videos (often youtube) lately, compling them, then emailing them off.
- there could indeed be the answer.
What is the Iphone 'doing' all day?
How big are the videos? You are 'handling' them twice.
Never mind SWMBO - where we are all confused!