[SOLVED] Download speed very low, upload speed OK

[jakenl]

Yes indeed. I didn't think that I tinkered too much with my setup. However, with the power issues that I had with those 3 USB devices together, I might have introduced file corruption somewhere along the line.

Something new with this rpi3, is that I have seen quite a few alerts with the thermometer on the screen. With open box the cpu is still 65 degrees during idle, while my other setup is below 50. I added a heat sink and that lowered it with 5 degrees, but with a closed cover, I am back to 65 again.
It is one of those red/white raspberry boxes without any ventilation openings. Not the best design. Cpu load with 'top' is during idle around 1.5 percent, not to bad, I'd say!
Maybe I will take my Dremel and create some air flow already from the bottom side.

EDIT: it turns out they for the last 24hr, there is a root process that takes 8 to 10 percent cpu continuously. From the PID number I was able to trace it back to a kworker process name. Kworker seems to stand for kernel worker.