Folder Source

Path your files are stored on host machine, more information.

Windows users: You must use forward-slash c:/dev/vagrant/webroot or double back-slash c:\\dev\\vagrant\\webroot

To upload files, rsync is used on $ vagrant up, $ vagrant provision and $ vagrant reload.

Now may be a good time to work out your deployment strategy.

Folder Target

Path your hosts' files are uploaded to on guest machine, more information.