you are not ment to use Adaptive Qos on a fiber connection !!
That's not strictly true. QOS helps decide prioritisation of traffic types and particularly if you do manage to use your bandwidth with multiple devices.
If you had several file downloads going on for example OR was using your upstream for serving data like media streaming (where its normally limited to a lower figure on a lot of cable tv broadband, for example 22mbps or 38mbps upstream but 380mbps downstream). You can prioritise media streaming for example in this scenario than uploading to OneDrive.