I've had a 3 pack setup for 3 years. One of the satellites just stopped working, flashing blue. It's wireless. App says it's offline and can't be found. I unplugged and replugged, updated firmware,...

I need to add a switch so I can have my PC and Magic Jack both plugged in. My PC download speed is terrible on wifi. Do I just need an unmanaged switch? Lilke a netgear 8 port unmanaged?