In the Backup and Reporting section you can backup or restore the content of a single database including permissions.  Backups are stored on the server, but you can download them as a file e.g. for archiving or transport. You can restore a database from a backup on the server. A backup file can be uploaded in advance. 

Create a backup of a database by clicking the Create new backup button in the upper right corner. Select the database you want to back up. You can only select databases for which you have permission.  Enter the name of the backup in the respective field. Start the backup by clicking the Start backup button.

In the list of backups on the server you can delete individual backups or download them as a file.

Click the Upload backup file button in the upper right corner to open the upload section. Click the button Select backup to pick an existing backup file from your device.  Enter a name in the respective field and click Confirm. The backup file is uploaded and can be seen in the list of backups on the server. 

Note that the creation date of the backup corresponds to the time of the upload.