Try the 30 30 30 rule https://www.lifewire.com/hard-reset-rule-for-routers-3971318

Try https://www.whatismyip.com/ and see if your ISP gives you a IPv6 address in addition to an IPv4 address. Does your router support IPv6? If so, set it up.

@hendiro Check the IPv6 to see if it is working. Use a tool such as https://test-ipv6.com/ or one of the others that can be found on the internet. I wonder if that site is IPv6.

@hendiro The point of the link was the USB drive was causing the router's CPU to max out. Yes, different model of TP-Link.

Many times once you brick a router, that is the end of it. Some of those custom firmware packages on some routers are non reversible. They are a hack by hackers. Big issue is you need to get the...

@hendiro I do not know what those messages mean either. Found this thread https://community.tp-link.com/us/home/forum/topic/110360 on high CPU issue. Another longshot - Also try replacing the cable...