Exporting An Armature?

So, I made a map and a character in two separate blend files.
How do I export the character with the armature? Hitting export then importing doesn’t work. It only does the player. I can’t find an ‘export selected’ so I assume it just exports whatever is in the scene, from what I’ve tested. Also, I attached the armature to my character, will it stay attached at import? Thanks.