SetFileValidData error (code = 87)
I wonder if I can take a shot at this? - I'm still pretty new here, too so definitely wait for more responses than me, but... it looks like you are trying to plot 3982.5gb's....
That doesn't divide evenly by 8 - that would at least result in non-optimised plots?
Try instead, plotting 3.952.000 Tb
Fixed itself when I unchecked "Run as Adminstrator" in xplotter.