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. Choose 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, choose Delete Files.