I noticed this warning because it stops one of my applications (BOINC) from being able to work on a number of BOINC projects.
The 'Low Disk Space' warning says that I have 1.1GB remaining. I cannot work out where that number comes from.
The OS is installed on sda1 which is a 256GB SSD.
I use a HDD sdb1 of 1000GB (984.4GB formatted) to store my own bits and bobs.
I've been looking for the problem but I'm obviously out of my depth.
sda1 shows in Properties as having 31.8GB used with 151.2GB free.
sdb1 shows in Properties as having 375.2GB used with 559.2GB free.
What the devil is going on?