Hello & Welcome to Just Answers.
It sounds pretty clear that your husband has a rampant porn & masturbation addiction, but this doesn't mean that he's a pedophile. He very well could be, but the connection is not a direct one. Most pedophiles are sex addicts, but most sex addicts aren't pedophiles.
The ramifications for your children would come from being children of addiction and the losses that come from him being tied up in his addictive double life. Like the 'absentee parent' syndrome...even if he was 'there', he wasn't 'there'.
When I treat a family with active addiction in one of the parents, I suggest supervised visitation. When a person can't control their impulse to use, they move all kinds of priorities around to allow the addiction time to flourish...this most often shows up as neglected, unprotected children. Children of your's ages need a high level of supervision, so I wouldn't leave them with him unattended or overnight unless court ordered.
Let me give you some links to sites that will help you understand the sexual addiction/compulsivity issues at hand here.linklinklink
Keep those hard drives and use them in court! Good move on that one.
My best to you.
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