Newbie to Dropbox and am trying to set up 2nd factor authentication for security purposes but the only options I'm presented with are "texts" to a mobile phone or using a mobile authenticator app. I do have a yubikey (hardware token) and would prefer setting up the yubikey instead of the other two methods (texts/authenticator app). My Dropbox account, btw, is a "promotional" account (HP device purchase) which is being made available by Dropbox for 12 months. Could this be the reason for my not being able to setup the yubikey for 2nd factor authentication ?
