In this article: Setup, Cloud database, Synchronization times, Synchronization mechanism, Synchronization status, Passwords mismatch, Troubleshooting.
Press the More menu and select Settings > Cloud Sync. Here is a list of supported clouds: Google Drive, Dropbox, OneDrive. You should have an existing cloud account to proceed.
Tip: There is also another option called Another cloud (via WebDAV). This option allows to connect Network-attached storages (NAS) and other clouds, which...