to add to Calin's comment above, depending on which distro and what . where you have things mounted you can just set the path.
from the command line just type
mount
here you can see a list of what is mounted where, you can also see , and add to /et/fstab , which handles mounts on boot etc..
<LowHDDSpace Enabled="true"> <Hdd Percentage="20" Path="/mnt/remote_server" Enabled="true" /> </LowHDDSpace>
@Calin Can you monitor by size_remaining and not % also ? 20% of 1tb is still pretty large, but in other machines I have 150gb, therefore 20% would be fine, and I don't want to have to set 2%, just to cover the 1tb disks. I would prefer to set remaining space,