The all-in-one "security checkup" concept isn't new -- Facebook set up a dedicated page for mobile users to review access preferences and change passwords since late 2015 -- but social media sites are different than cloud storage services, where folks might stock their sensitive files. Proactively de-linking your Dropbox from a public computer browser you used once or your ex's device might prevent a shady someone from copying your private stuff. Or if you need to change login info if a hacker gets access to 60 million Dropbox logins, as happened back in 2012.