@tanveer2137 I can't explain this. A coincidence? The test with just Main Deco is final, because it can't run without Ethernet link. I suggested first test, with unplugging Satellite, because it is...

@tanveer2137 It is possible there is additional WiFi interference near 2nd Deco, which impacts speeds. A fridge, microwave, something inside the wall or on the other side of the wall that you can't...

@Kroppi This usually happens when user configured external storage with static IP address. Configure WD MyCloud to obtain IP address dynamically and it should connect and will be recognized. Then,...

@DefC0n1 Yes - you can. Here is configuration page from Deco app where you can configure which WiFi bands Deco will broadcast at: In this screeshot, user decided to disable 2.4GHz and leave 5GHz...

@tanveer2137 Yes, these test results point strongly to Ethernet cable at the 3rd location. Main Deco can establish Ethernet link, but unable to negotiate speeds faster than 100Mbps. If you have...

@AdvLuke Not sure why that would be: for ISP router Main Deco should appear as just another client, such as PC. No special changes should be necessary if Main Deco configured with getting dynamic IP...