Currently I have / in /sda1, which has 732.3GB.
All I want to do is separate /home in a new partition, so that later on I can install Ubuntu 16.04 while preserving the data in /home.
The 732.3GB partition has 664.4GB being used, so I can't create a new parition for /home using Gparted, I have to somehow divide the existing partition into 2, with the new one being exclusively /home.
I don't how to explain it better, but I would really appreciate your help.
The basic idea is to boot from live USB/DVD of Ubuntu and use Gparted from the live USB to shrink the existing / partition.
However, you have too much data to shrink the partition and create empty space. You will need an external hard drive to move some of the data from /home. Then you will be able to shrink /, create new partition and move the /home to the new partition.
The details are at
https://help.ubuntu.com/community/Partitioning/Home/Moving
Hope this helps
