Clear the Delivery Optimization cache 

Delivery Optimization in Windows 10 clears its cache automatically. Files are removed from the cache after a short time period or when their contents take up too much disk space. However, If you need more disk space on your PC, you can clear the cache manually.
In the Search box on the taskbar, enter disk cleanup. Select the Disk Cleanup app from the list of results.
On the Disk Cleanup tab, select the Delivery Optimization Files check box.
Select OK. On the dialog that appears, select Delete Files.
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