It is a file synchronization and backup tool. It allows you to synchronize files and folders with Dropbox cloud storage and other devices. It can synchronize photos and documents. It can bi directionally synchronize the files in the device, and the files on your device will be consistent with those on the cloud. All file transfers and communications between user devices and cloud storage servers are securely encrypted and do not pass through our servers. No external person can decrypt, view or modify the contents of any file.