This command enables you to backup GSAK (Same functionality as the GUI File=>Backup)
File = The fully qualified zip file backup to create. Database = The database names to backup. Separate each one with a ; (semi colon). The reserved value of "All" will select all databases for backup. You can leave out this parameter if you only want to back up the settings. Settings = Optional and defaults to "Yes". Allows you to include/exclude settings for a backup. GrabbedImages = Optional and defaults to No. Allows you to include/exclude grabbed images.
Example, backup just two databases (Default and Myfinds) to your application data folder