You have to save **all **your stuff (except of us files) into the content folder 
Btw, next time please post your UDK questions into the UDK forum https://forums.epicgames/forums/366-UDK 
You have to save **all **your stuff (except of us files) into the content folder
Btw, next time please post your UDK questions into the UDK forum https://forums.epicgames/forums/366-UDK