I have two partitions on my SSD disk, one for root mounted at /, and one for home folder mounted at /home.
The problem is that GParted doesn't detect the home partition, it thinks that it doesn't exist and count it along with other free space:
It's worth to mention that I get this message when I open GParted:
Partition(s) 1 on /dev/sda have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.
But GNOME Disks does detect it:
And also while I was trying to install Mint 19, the same thing happened; It didn't detect the home partition and showed just the root partition.
But the home partition exists and it's working, I can browse its files and I am using it as for my home folder. Why isn't showing up? I am using Ubuntu 18.04.