question: How to manage Device Groups on a router running ExpressVPN
answer: 
  This guide will explain how to use and manage Device Groups. With Device Groups (available on ExpressVPN for routers v3.2.0 and above), you can sort your devices into groups, each connected to a different VPN location.
  
  Jump to…
  
  When to use Device Groups
  Add new device groups
  Change default group
  Add devices to (or remove devices from) a device group
  Rename device groups
  Change device names and IP addresses
  Delete device groups