Dropbox is asking users to change their old passwords as part of a "preventative measure".

In a blog post, the file-sharing and cloud storage company called out to users who haven't changed their passwords since mid-2012, saying the login credentials are potentially at risk and should be updated.

Dropbox insists, however, that it's just being pragmatic, and that there's no indication any accounts have been compromised.

Instead, Dropbox is just trying to shore up any loose ends from a previous security breach disclosed in 2012, when it discovered that usernames and passwords were stolen from other websites and used to log into a "small number" of Dropbox accounts...

Read more: Dropbox prompts users to reset old passwords | ZDNet

See also: Resetting passwords to keep your files safe | | Dropbox Blog