Both drop box personal and business are not secure. I have lost my important personal data and business data. And I saw form the dialog box that my data was deleted while I was offline and nothing I can do to stop it. The customer service of dropbox is super pool. They don't help you to solve the issue, but ask you to upload lots of document and eventually nothing change at all. Eventually I have to transfer my data all to somewhere else and completely delete the account to make sure others not stole my data.
