We have a Netgear D6200 Wireless Router. There is a Seagate Goflex Home network Storage device connected to it (Via Eth). The Storage device is used to host media to stream to our various Media players.
We have a number of wireless devices connected to the Routers Wifi. This includes Laptops, Smart Phones, Tablets, TV's, Bluray & media players.
We find that on all of the Media players (TV's, Bluray Players, media players), they will lose Wifi connectivity at some stage. This can happen 3-5 times whilst watching a movie. They all re-establish connection shortly after, but the outage is always long enough that you have to search for & FFWD the movie back to where you were again.
However they never disconnect at the same time. It's just random on which device disconnects.
Wifi reception to all of the devices is fine. They all are near max reception.
All of our laptops, smart phones & tablets all stay connected to Wifi. They also stay connected when streaming media from the media NAS.