Apple's iCloud online storage jumped 20 percent in the most recent quarter, the company noted on its earnings conference call with analysts.
Apple chief financial officer Peter Oppenheimer said the company now has 300 million iCloud users. In January, Apple noted that iCloud had 250 million users.
The service stores and syncs data from Apple customers, such as calendars, email, photos and more across the various Apple devices that users own. Last month, Strategy Analytics reported that Apple held 27 percent of cloud storage usage in the United States during the third quarter of 2012, leading rivals.