I have been playing the Space Astronomy pack recently, but every so often it will freeze for me and a few times i have lost my whole save. I tried to back up my save by going to C:\Users\Name\Documents\Curse\Minecraft\Instances\Space Astronomy\saves. I was told this was where to back up your save files. So i copied it and when i went to use the back up nothing happened. I'm not the greatest tech wise so any help would be greatly appreciated.
What you should be doing is going to that saves folder and then copy your world to your desktop or a flash drive. Then once it is saved somewhere besides the saves folder just drag and drop it back into the saves folder if your world ever gets deleted.