I built my first PC today and all went smoothly. I installed my M.2 drive only while I installed windows but had the power plugged into my 1TB SSD and 2TB HDD. Everything is working fine but my SSD and HDD aren't showing up when I look in file explorer. I checked in BIOS and it says my Crucial MX500 is there and the 2TB Seagate is recognised but not when i look in file explorer. I made it so empty drives wouldn't be hidden but nothing has changed. What could it be?