Dropbox is a cloud storage service that allows users to store and sync their files across multiple devices. It was founded in 2007 by Drew Houston and Arash Ferdowsi as a startup company, with initial funding from seed accelerator Y Combinator. Dropbox offers cloud storage, file synchronization, personal cloud, and client software. Some key features of Dropbox include:

• File storage and sharing: Users can store and share files, folders, and links with others.

• Collaboration: Dropbox offers productivity tools that allow users to create and share download links and collaborate with others directly through the app.

• Security: Dropbox is designed with multiple layers of protection, including a two-step verification system. Users can also password-protect shared files, set expiring links, and control download permissions.

• Accessibility: Dropbox allows users to access their files from anywhere, using the Dropbox app or website. Files in the Dropbox folder on a users desktop will automatically sync to dropbox.com and to the Dropbox mobile app on any other devices connected to the account.

Dropbox offers both free and paid plans, with additional features and storage available for paid plans. Dropbox has experienced criticism and generated controversy for issues including security breaches and privacy concerns.