.RDG File Extension
File TypeRDCman Config File
What is an RDG file?
Config file used by RDCman, which stands for Microsoft Remote Desktop Connection Manager; stores connectivity settings, which includes a list of servers in which the computer is connected; designed to be portable meaning that you can share them with other users so they can get connected quicker to select servers.
NOTE: Remote Desktop Connection Manager is a tool for managing remote desktop connections.