Dropbox now has 45 million users saving one billion files every three days, the company announced Tuesday.
The company is also expecting to hit $240 million in revenue in 2011, according to a profile in Forbes on Dropbox and its CEO Drew Houston.
Dropbox competitor Box.net also recently closed a sizable round -- $81 million. Box is currently enticing iOS users with 50 GB of free storage.
But Apple's just-launched iCloud could be Dropbox's greatest threat to long-term success. Steve Jobs and Apple, reports Forbes, saw the company as a "strategic asset" and offered to buy it for an undisclosed nine-digit figure in 2009. Dropbox rejected the offer.
"Jobs smiled warmly as he told them he was going after their market," Forbes details of Houston's recounting of the meeting. "He said we were a feature, not a product," Houston said.
Dropbox has 70 employees. The startup's Series B round was led by Index Ventures with participation from a slew of new and repeat investors. To date, Dropbox has raised a total of $257.2 million.