Interesting... It took a few clicks to find out what Box is: https://support.box.com/hc/en-us/articles/201207836-What-is-... I wonder, what's the incentive to use Box instead of Dropbox? The space is nice, but trust isn't so easily earned. I'm wondering why to trust Box with personal files.
Box is HIPA compliant -- Dropbox is not. Generally Box is well known for its security, whereas Dropbox accomplishes a solution to its problem but I wouldn't trust confidential files on it.
And do you have a link to what usage is HIPPA compliant? A free account probably isn't one of them. Though I could be wrong.