Dropbox is among a number of public companies that are increasingly turning to direct lenders for easy access to financing. Blackstone Inc. has expanded its private credit line for the file-sharing site Dropbox Inc. to $2.7 billion, nine months after striking the initial deal. Most Read from Bloomberg Dropbox increased its leverage by $700 million while authorizing a new $1.5 billion stock buyback plan, a filing and company statement show. Blackstone first put together a $2 billion private credit loan in ...