If modern routers are delegated to router duty only, this wouldn't be a problem. However, routers these days are for all intents and purposes, specialised home

If modern routers are delegated to router duty only, this wouldn't be a problem. However, routers these days are for all intents and purposes, specialised home servers with shared media streaming and the like as well. These are value-added functionalities ISPs use to entice new users and I'm sure a fair number of them use these to store photos, connect their USB drives - mine is also a print server for use with non-wifi network printers.