Your space is over allocated.
Set the new size to 100 GB, not 10 gb. Better yet set it to 800GB, set the time limit clip to 14 days. The reason 7 cameras at 4 GB per camera for a single recording is more space than you have defined.
I do not see the need for a stored folder on the same drive as the new. I use a single new folder for my storage, then delete from there.