I don't question the free time, I doubt the ability for someone already under a fair amount of emotional distress to be able to hide reading thousands of pages of classified data.

Even with the route she took, it was only a matter of months for her to make a mistake that got her arrested. Giving it to wikileaks reduced her anxiety, going through it likely would have ramped it up. Additionally, needing to keep a local copy of the data is a huge risk.