Opponent historys

As i continue using the hud my opponents stats are growing but is it possible to get larger databases of history or even the entire sites hand history? I’ve seen people talking about importing files from other places. Is that what people are doing? Do people share their hand files to get a bigger list of opponents hands, and if so who would i ask to get this? I was also going to ask if our own hud stats always needed to reset each session or is there a way to show it as a cumulative total, or even both to see how we’re playing today vs our history.