I wanted to set up my router. At that time it wanted an IP address and I have given 192.168.254.254. But I don't why I couldn't access the IP address even after trying many times. What should i do now

My Archer CR 700 media server does not display all folders in the NAS when viewed from my xbox1 or moto z play2. I can't tell if this is a sharing problem or a problem with the router. Thanks for your