The partition is corrupt (in my case not done right)
This can be determined, by looking at the claimed size of the partition, the amount used and the amount remaining.
The claimed size of the partition is 320GB, the size of the drive.
The amount used on the drive or partition, is 13GB.
So there should be lots of space left, not just a few hundred megabytes.
I managed to resize it in Paragon to about 195GB but it is still corrupt and this can be shown in a similar manner.
The claimed size was 195GB.
This time, the amount remaining was 195GB. So that wasn't right as I was using 13GB.
So definitely partition was not done right, and that is the or a sign of it.