Any way to create a copy of a load?

[Frost]

So there are different save slots, and you can "load" a choice of save slots. If there's a save slot I like to play from (like before a fight I like to play), is there any way to make a copy while I continue on with a different save slot? That way I can sometimes reload the fun save slot to play a few fights, or load the main save slot to continue the campaign.

EDIT: I found the save files and made a copy and that worked. Is there any simpler, in-game way? I'm assuming not.