[Extremely slow balance speeds]

I have 16 disks and the balancing is done at 10 mbps, it's horrible. 
If I do speed test to the disks individually, the speed is 400mbps so it is a drivepool problem, how can I fix it?

[Problem with Archive disks]

I run into the problem that my drivepool does not allow me to balance the disks now, I moved drivepool from computer and now drivepool tells me a file limit on each disk of 0.0%, with the SSD it works fine but with the archive disks it does not work.

 

I run into the problem that my drivepool does not allow me to balance the disks now, I moved drivepool from computer and now drivepool tells me a file limit on each disk of 0.0%, with the SSD it works fine but with the archive disks it does not work.

The file location limit is always 0.0% and I don't know how to fix it.