Windows 10 high secondary disk IO causes System unresponsiveness

[Microsoft Windows]

My system has two 4TB nvme SSDs and a large SATA HDD for bulk storage of seldomly used files.Windows 10 and all programs are installed to one of the SSDs.Whenever the HDD is at 100% load with datarates below 200MB/s, the whole system becomes sluggish, especially the explorer windows who freeze regardles of which folder is selected.I already tried enabling "Launch folder windows in a separate process" but it made no difference.Is there some setting that needs to be modified to prevent the freezing?ThanksSystem specs for reference3950X32GB DDR4 @3800MT/s4TB 990 Pro SSDs6TB WD Gold HDD

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