@praveengk - It would help to be more specific. Which data folder and where? In Crestle or local or another place? Also, do a pwd to show what folder you are currently on.
Few pointers - If you are inside a git repo, you can find out by doing git status. If you see data folder as deleted, you can do git checkout -- . (to reset changes). But that will only work if you did git clone. If it helps, please also add screenshots. You can drag them to the posts directly.