 In June 2017, the company announced a major global network expansion, aiming to increase synchronization speeds while cutting costs.The expansion, starting with 14 cities across 7 countries on 3 continents, adds "hundreds of gigabits of Internet connectivity with transit providers (regional and global ISPs), and hundreds of new peering partners (where we exchange traffic directly rather than through an ISP)".Dropbox uses SSL transfers for synchronization and stores the data via Advanced Encryption Standard (AES)-256 encryption.