How can I easily add additional animations?

So I have a character that I’ve been slowly adding new animations in each day. The thing is, I have to reimport the whole FBX of that character to just get that 1 or 2 new animations. It takes so long to import when you have dozens of animations already. Is there a way or a plug-in to just import that specific animation so I don’t reimport the entire FBX file?