Dropbox for Business to help companies work smarter but people still want to access their personal stuff at work. The solution is the connection of their personal Dropbox to their Dropbox for Business accounts. Each Dropbox will be labeled for personal or work, and come with its own password, contacts, settings, and files. In addition to single sign-on, two-step verification, sharing controls, and the admin console, the updated Dropbox for Business comes with a suite of new features:

- Sharing audit logs bring increased visibility and control over sharing and access of company data by letting admins audit the data flow itself.

- Remote wipe allows admins to delete a Dropbox folder from computers and mobile devices, making it perfect for company departures or device losses.

- Account transfer lets admins transfer all the files from a de-provisioned user into another team member's Dropbox, letting teams operate without skipping a beat.

Starting this month, Dropbox will be rolling the new features out to its Dropbox for Business customers.

The Dropbox upgrade comes at a time when large rivals like Microsoft and Amazon and smaller competitors are battling to win the cloud-storage market, which is widely seen as a strategic linchpin in the era of mobile computing.

Amazon today unveiled a similar tool called WorkSpaces for large enterprises at an event in Las Vegas.

Dropbox for Business costs $795 a year for unlimited storage for five users and $125 for each additional user.