update readme

README.md

@@ -3,5 +3,6 @@ A little vimrc setup for remote servers
 # Setup
 1. Clone the Repo into ~/.vim
 2. create a symlink like this: `ln -s ~/.vim/vimrc ~/.vimrc`
-3. open vim
-4. run `:PlugInstall`
+3. cd into .vim and `mkdir undo backup swap`
+4. open vim
+5. run `:PlugInstall`