init.el

(defvar emacs-autosave-directory
  (concat user-emacs-directory "autosaves/")
  "This variable dictates where to put auto saves. It is set to a
  directory called autosaves located wherever your .emacs.d/ is
  located.")

(unless (file-exists-p (emacs-autosave-directory))
    (make-directory (emacs-autosave-directory)))

(setq auto-save-file-name-transforms `((".*"
,emacs-autosave-directory t)))