Where are my layers?

So I was wondering how I can restore my layers and prefabs. Earlier this morning my prefabs weren’t letting me drag them onto a scene. So I went into where I had saved them and renamed them, then unity reloaded the prefab normally and I could use them! Now, the problem is, my layers are missing, so my enemy characters don’t know what a solid object is…etc So where is my layers file located? How can I force unity to reload it?

Layers are stored in a file called “TagManager.asset” in your ProjectSettings folder. If your restart Unity it will load that file, but if it somehow got deleted, your layers are gone and will have to be recreated.