Default Backup doftware

I have an external HD(network drive) hooked up to my router and I use it to backup my computers and devices on my network. What is a good app I can put on my note 3 that will automatically back up files and pictures to my home network drive? I have a static ip address from my ISP. I also want it to backup files and pics no matter if I am on my home network or using Mobile data.

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