iCloud is able to store documents, just as you would on a drive attached to your Mac, enabling you to update those files wherever you have access to an app that can open them, and keeping them in sync between devices. With iOS 8 and Yosemite, Apple changed the way in which documents are stored and browsed in iCloud. The old system, called Documents in the Cloud, provided strictly separated areas for each app’s files. Its replacement, iCloud Drive, is far more flexible, as it works much like the Finder in OS X. iCloud Drive can store documents from different apps in the same folder, and you can nest folders inside each other too. iCloud Drive retains the previous system’s tagging feature, which enables you to assign keywords to files and then search for them instead of just filenames.