The problem of having files stored in the cloud is that they're not accessible when you're offline. For a while now, Google has been attempting to change this by making files on Google Docs, Sheets, and Slides available to download for offline viewing or editing.
With the latest update to the three apps, any file that has recently been opened will be downloaded to your device. (Note: Slides has not rolled out yet, but we'll let you know when it does.) If you lose your internet connection, this file will be available offline. The changes you make will then be synced back once you've got an internet connection.Read More