I did this test because uploading files to NAS is incredible slow today. The only different is my new WF2190 last week. I spends hours to do a full check of my NAS and eventually find out it is related to driver. I didn’t uninstall D-Link DWA-171 rev A1‘s Realtek driver before installing netis WF2190. During the test, I also learned the difference of my WiFi devices.