@mackanz If your "modem" is just a modem and not a router,most will only allow one device to connect (normally a router) you may need to connect your first deco to it in router mode via one Ethernet...

@weikianng Anytime you can cable a connection, you'll be much better off, plain and simple. Especially if it is a device providing a service (NAS, printer, etc.) needing consistent high throughout...