Back on the laptop.
AFCO has records on a particular system which, I am reliably told, goes back about 3 years. The records from the previous system would not have been transfered to the new system.
The figures of 6 or 10 years and 600000 do not therefore hold up in relation to normal systems out there.
Somone must have done something quite deliberate to actually get 600000 records on to that laptop. As the STh said (I think they did), what was a junior officer doing with all those records.