Have you tried addressing your router with it’s IP address? For instance, if the IP address of your local router is 192.168.1.1, then address it something like //192.168.1.1/readyshare
I’ve never used the hard drive feature of a router (FYI I’ve been using ASUS), but I know when I want do Windows 10 or Windows 11 Pro to my Linux or BSD computers, I have to use the IP style for example make N: drive attach to my foldertree called cifs_insecure, I can’t browse to either //NetDrive or just browse and have it find anything on the Windows Network (BTW you have to set up local network sharing - Google Windows sharing as the settings for this are constantly changing as Microsoft is constantly trying to make things difficult for people who don’t take various IT expert courses, a great revenue stream!! So anyways, as you go through mostly by trial and error, use the IP addressing method as it makes things easier getting around the implementation of managing who is the WINS server.