100 percent

Hi guys, My system is. R5 3600 Rtx 2070 3 sata SSD 1 nvme ssd (boot drive) 2 3.5 HDD. 16gb 3200mhz ram. 1 of the sata ssds is at 100 percent usage for about 2 minutes at first boot up. The things I've tried are: I've reset the pc with a fresh usb of windows, swapped the sata cable, plugged...