so I got 2x 4 Drive bays attached via USB3.0 to my computer. Inside are 3x 8TB hdds in 1 enclosure and 2x 8TB and 1x 4TB drives in the other.
These are just for archival purposes. Movie files, Books, Home Videos, Games, etc.
Nothing is in use until I access it from Plex or select a file to open, etc etc.
So why are the harddrives always running at around 33 degrees Celcius and the Fans to the enclosures blasting. I recently cleaned the enclosure fans and moved around the drives so there were only 3 in each (before it was 4 in 1 and 2 in the other). And when I did that they both ran quiet, no fans at all. But a few weeks ago the fans are running full blast and the drives are hot and I presume in use. How do I prevent this so they remain quiet and only spin when accessed?