How do I configure QoS on my router,

Please launch your browser and enter http://dlinkrouter.local or into the address bar. Then login and follow the steps below:
Step 1: Click Features -> QoS Engine
DIR-878 Setup
Step 2: To assign a priority level to a device, drag the device card from the Connected Clients list to an empty slot and release the mouse button. The card will move to the priority slot. If you want to remove a priority assignment from a device and return it to the All Devices list, click the cross icon in the top right of the device card.
A maximum of one device can be assigned Highest priority.
A maximum of two devices can be assigned High priority.
A maximum of eight devices can be assigned Medium priority.
DIR-878 Setup
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