Database Backup for Multisite

I just wondered if anyone could maybe help me out. I have a multisite wordpress and I have the plugin that allows it to set up the new sites across multiple databases. Is there a plugin that will help me keep all those databases backed up? Right now I am just going to my databases and clicking on each one and exporting them into a folder on my computer. I am only using 16 databases so this isn’t taking a huge amount of time but I would love for it to be automatic.