How to Backup

[Carlton Brooks]

I have an Odroid running an OwnCloud set up located in another room of 
my house but attached to my network.

It resides at 192.168.1.XXX
I have also created a noip address for it.
It has been working fine for over 5 months.
I have added almost 563 GB of files to it.

How do I back it up without physically pulling out and copying the hard 
drive.
I would like to back it up over the network if possible but I can not 
seem to figure it out.

If the above is not clear, I will post more information.

Thanks
Carlton Brooks