I have only one partition right now. I want to make two partitions. But I am unable to do so. I am using GParted for this. Here is the screenshot of gparted.
When I click on resize. The minimum amount is always 0.
I have only one partition right now. I want to make two partitions. But I am unable to do so. I am using GParted for this. Here is the screenshot of gparted.
When I click on resize. The minimum amount is always 0.
As @Pilot6 says, that is because you can not resize the partition you are currently using (where your Ubuntu and Gparted are installed).
You will need to create a Ubuntu Live CD/USB where you will be able to run pre-installed Gparted and resize your partition.