Have a look on MacRumors forums
I am still using an external drive, been doing so for 4 years, a new 1tb one will be £60, it’s hard to argue with that when time comes to replace. I’m very much Mac based but TIme Capsual I don’t have.
The Time Capsual works really neatly, allows multiple devices to connect and you get the benefit of the WiFi router which is probably much better than the one you currently have. I woukd check you broadband supplier as not all allow you to use your own router and if you are getting a Time Capsual it’s looks an expensive solution of you don’t use the wifi part.
For me if I can justify the £250 I’ll get one for wifi and conveninence otherwise it will be the £60 solution.